diff --git a/crates/component-macro/src/bindgen.rs b/crates/component-macro/src/bindgen.rs
index 4b55c924a58..e35b20af65b 100644
--- a/crates/component-macro/src/bindgen.rs
+++ b/crates/component-macro/src/bindgen.rs
@@ -149,6 +149,7 @@ impl Parse for Config {
                             .collect()
                     }
                     Opt::Stringify(val) => opts.stringify = val,
+                    Opt::SkipMutForwardingImpls(val) => opts.skip_mut_forwarding_impls = val,
                 }
             }
         } else {
@@ -219,6 +220,7 @@ mod kw {
     syn::custom_keyword!(trappable_imports);
     syn::custom_keyword!(additional_derives);
     syn::custom_keyword!(stringify);
+    syn::custom_keyword!(skip_mut_forwarding_impls);
 }
 
 enum Opt {
@@ -234,6 +236,7 @@ enum Opt {
     TrappableImports(TrappableImports),
     AdditionalDerives(Vec<syn::Path>),
     Stringify(bool),
+    SkipMutForwardingImpls(bool),
 }
 
 impl Parse for Opt {
@@ -378,6 +381,12 @@ impl Parse for Opt {
             input.parse::<kw::stringify>()?;
             input.parse::<Token![:]>()?;
             Ok(Opt::Stringify(input.parse::<syn::LitBool>()?.value))
+        } else if l.peek(kw::skip_mut_forwarding_impls) {
+            input.parse::<kw::skip_mut_forwarding_impls>()?;
+            input.parse::<Token![:]>()?;
+            Ok(Opt::SkipMutForwardingImpls(
+                input.parse::<syn::LitBool>()?.value,
+            ))
         } else {
             Err(l.error())
         }
diff --git a/crates/component-macro/tests/expanded/char.rs b/crates/component-macro/tests/expanded/char.rs
index 4aece793b1c..a9115c2ad89 100644
--- a/crates/component-macro/tests/expanded/char.rs
+++ b/crates/component-macro/tests/expanded/char.rs
@@ -77,13 +77,22 @@ pub mod foo {
                 /// A function that returns a character
                 fn return_char(&mut self) -> char;
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/chars")?;
                 inst.func_wrap(
                     "take-char",
@@ -91,7 +100,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (char,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::take_char(host, arg0);
                         Ok(r)
                     },
@@ -99,13 +108,32 @@ pub mod foo {
                 inst.func_wrap(
                     "return-char",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::return_char(host);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                /// A function that accepts a character
+                fn take_char(&mut self, x: char) -> () {
+                    Host::take_char(*self, x)
+                }
+                /// A function that returns a character
+                fn return_char(&mut self) -> char {
+                    Host::return_char(*self)
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/char_async.rs b/crates/component-macro/tests/expanded/char_async.rs
index e3971a68d08..2b79271240a 100644
--- a/crates/component-macro/tests/expanded/char_async.rs
+++ b/crates/component-macro/tests/expanded/char_async.rs
@@ -10,8 +10,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::chars::Host + Send,
             T: Send,
+            U: foo::foo::chars::Host + Send,
         {
             foo::foo::chars::add_to_linker(linker, get)?;
             Ok(())
@@ -73,19 +73,30 @@ pub mod foo {
             #[allow(unused_imports)]
             use wasmtime::component::__internal::anyhow;
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 /// A function that accepts a character
                 async fn take_char(&mut self, x: char) -> ();
                 /// A function that returns a character
                 async fn return_char(&mut self) -> char;
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/chars")?;
                 inst.func_wrap_async(
@@ -94,7 +105,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (char,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::take_char(host, arg0).await;
                         Ok(r)
                     }),
@@ -102,13 +113,34 @@ pub mod foo {
                 inst.func_wrap_async(
                     "return-char",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::return_char(host).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                /// A function that accepts a character
+                async fn take_char(&mut self, x: char) -> () {
+                    Host::take_char(*self, x).await
+                }
+                /// A function that returns a character
+                async fn return_char(&mut self) -> char {
+                    Host::return_char(*self).await
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/conventions.rs b/crates/component-macro/tests/expanded/conventions.rs
index 56fd70e2f3f..cb9290805c4 100644
--- a/crates/component-macro/tests/expanded/conventions.rs
+++ b/crates/component-macro/tests/expanded/conventions.rs
@@ -125,18 +125,27 @@ pub mod foo {
                 /// Identifiers with the same name as keywords are quoted.
                 fn bool(&mut self) -> ();
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/conventions")?;
                 inst.func_wrap(
                     "kebab-case",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::kebab_case(host);
                         Ok(r)
                     },
@@ -147,7 +156,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (LudicrousSpeed,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::foo(host, arg0);
                         Ok(r)
                     },
@@ -155,7 +164,7 @@ pub mod foo {
                 inst.func_wrap(
                     "function-with-dashes",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::function_with_dashes(host);
                         Ok(r)
                     },
@@ -163,7 +172,7 @@ pub mod foo {
                 inst.func_wrap(
                     "function-with-no-weird-characters",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::function_with_no_weird_characters(host);
                         Ok(r)
                     },
@@ -171,7 +180,7 @@ pub mod foo {
                 inst.func_wrap(
                     "apple",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::apple(host);
                         Ok(r)
                     },
@@ -179,7 +188,7 @@ pub mod foo {
                 inst.func_wrap(
                     "apple-pear",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::apple_pear(host);
                         Ok(r)
                     },
@@ -187,7 +196,7 @@ pub mod foo {
                 inst.func_wrap(
                     "apple-pear-grape",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::apple_pear_grape(host);
                         Ok(r)
                     },
@@ -195,7 +204,7 @@ pub mod foo {
                 inst.func_wrap(
                     "a0",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a0(host);
                         Ok(r)
                     },
@@ -203,7 +212,7 @@ pub mod foo {
                 inst.func_wrap(
                     "is-XML",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::is_xml(host);
                         Ok(r)
                     },
@@ -211,7 +220,7 @@ pub mod foo {
                 inst.func_wrap(
                     "explicit",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::explicit(host);
                         Ok(r)
                     },
@@ -219,7 +228,7 @@ pub mod foo {
                 inst.func_wrap(
                     "explicit-kebab",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::explicit_kebab(host);
                         Ok(r)
                     },
@@ -227,13 +236,66 @@ pub mod foo {
                 inst.func_wrap(
                     "bool",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::bool(host);
                         Ok(r)
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn kebab_case(&mut self) -> () {
+                    Host::kebab_case(*self)
+                }
+                fn foo(&mut self, x: LudicrousSpeed) -> () {
+                    Host::foo(*self, x)
+                }
+                fn function_with_dashes(&mut self) -> () {
+                    Host::function_with_dashes(*self)
+                }
+                fn function_with_no_weird_characters(&mut self) -> () {
+                    Host::function_with_no_weird_characters(*self)
+                }
+                fn apple(&mut self) -> () {
+                    Host::apple(*self)
+                }
+                fn apple_pear(&mut self) -> () {
+                    Host::apple_pear(*self)
+                }
+                fn apple_pear_grape(&mut self) -> () {
+                    Host::apple_pear_grape(*self)
+                }
+                fn a0(&mut self) -> () {
+                    Host::a0(*self)
+                }
+                /// Comment out identifiers that collide when mapped to snake_case, for now; see
+                /// https://github.com/WebAssembly/component-model/issues/118
+                /// APPLE: func()
+                /// APPLE-pear-GRAPE: func()
+                /// apple-PEAR-grape: func()
+                fn is_xml(&mut self) -> () {
+                    Host::is_xml(*self)
+                }
+                fn explicit(&mut self) -> () {
+                    Host::explicit(*self)
+                }
+                fn explicit_kebab(&mut self) -> () {
+                    Host::explicit_kebab(*self)
+                }
+                /// Identifiers with the same name as keywords are quoted.
+                fn bool(&mut self) -> () {
+                    Host::bool(*self)
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/conventions_async.rs b/crates/component-macro/tests/expanded/conventions_async.rs
index afbf0f1bed3..ebb02fb0653 100644
--- a/crates/component-macro/tests/expanded/conventions_async.rs
+++ b/crates/component-macro/tests/expanded/conventions_async.rs
@@ -10,8 +10,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::conventions::Host + Send,
             T: Send,
+            U: foo::foo::conventions::Host + Send,
         {
             foo::foo::conventions::add_to_linker(linker, get)?;
             Ok(())
@@ -107,7 +107,7 @@ pub mod foo {
                 );
             };
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn kebab_case(&mut self) -> ();
                 async fn foo(&mut self, x: LudicrousSpeed) -> ();
                 async fn function_with_dashes(&mut self) -> ();
@@ -127,19 +127,30 @@ pub mod foo {
                 /// Identifiers with the same name as keywords are quoted.
                 async fn bool(&mut self) -> ();
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/conventions")?;
                 inst.func_wrap_async(
                     "kebab-case",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::kebab_case(host).await;
                         Ok(r)
                     }),
@@ -150,7 +161,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (LudicrousSpeed,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::foo(host, arg0).await;
                         Ok(r)
                     }),
@@ -158,7 +169,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "function-with-dashes",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::function_with_dashes(host).await;
                         Ok(r)
                     }),
@@ -166,7 +177,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "function-with-no-weird-characters",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::function_with_no_weird_characters(host).await;
                         Ok(r)
                     }),
@@ -174,7 +185,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "apple",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::apple(host).await;
                         Ok(r)
                     }),
@@ -182,7 +193,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "apple-pear",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::apple_pear(host).await;
                         Ok(r)
                     }),
@@ -190,7 +201,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "apple-pear-grape",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::apple_pear_grape(host).await;
                         Ok(r)
                     }),
@@ -198,7 +209,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "a0",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a0(host).await;
                         Ok(r)
                     }),
@@ -206,7 +217,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "is-XML",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::is_xml(host).await;
                         Ok(r)
                     }),
@@ -214,7 +225,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "explicit",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::explicit(host).await;
                         Ok(r)
                     }),
@@ -222,7 +233,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "explicit-kebab",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::explicit_kebab(host).await;
                         Ok(r)
                     }),
@@ -230,13 +241,68 @@ pub mod foo {
                 inst.func_wrap_async(
                     "bool",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::bool(host).await;
                         Ok(r)
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn kebab_case(&mut self) -> () {
+                    Host::kebab_case(*self).await
+                }
+                async fn foo(&mut self, x: LudicrousSpeed) -> () {
+                    Host::foo(*self, x).await
+                }
+                async fn function_with_dashes(&mut self) -> () {
+                    Host::function_with_dashes(*self).await
+                }
+                async fn function_with_no_weird_characters(&mut self) -> () {
+                    Host::function_with_no_weird_characters(*self).await
+                }
+                async fn apple(&mut self) -> () {
+                    Host::apple(*self).await
+                }
+                async fn apple_pear(&mut self) -> () {
+                    Host::apple_pear(*self).await
+                }
+                async fn apple_pear_grape(&mut self) -> () {
+                    Host::apple_pear_grape(*self).await
+                }
+                async fn a0(&mut self) -> () {
+                    Host::a0(*self).await
+                }
+                /// Comment out identifiers that collide when mapped to snake_case, for now; see
+                /// https://github.com/WebAssembly/component-model/issues/118
+                /// APPLE: func()
+                /// APPLE-pear-GRAPE: func()
+                /// apple-PEAR-grape: func()
+                async fn is_xml(&mut self) -> () {
+                    Host::is_xml(*self).await
+                }
+                async fn explicit(&mut self) -> () {
+                    Host::explicit(*self).await
+                }
+                async fn explicit_kebab(&mut self) -> () {
+                    Host::explicit_kebab(*self).await
+                }
+                /// Identifiers with the same name as keywords are quoted.
+                async fn bool(&mut self) -> () {
+                    Host::bool(*self).await
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/dead-code.rs b/crates/component-macro/tests/expanded/dead-code.rs
index 600f5f49fa9..6734e3206ec 100644
--- a/crates/component-macro/tests/expanded/dead-code.rs
+++ b/crates/component-macro/tests/expanded/dead-code.rs
@@ -84,30 +84,72 @@ pub mod a {
             pub trait Host {
                 fn f(&mut self) -> LiveType;
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("a:b/interface-with-live-type")?;
                 inst.func_wrap(
                     "f",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::f(host);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn f(&mut self) -> LiveType {
+                    Host::f(*self)
+                }
+            }
         }
         #[allow(clippy::all)]
         pub mod interface_with_dead_type {
             #[allow(unused_imports)]
             use wasmtime::component::__internal::anyhow;
             pub trait Host {}
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
+                let mut inst = linker.instance("a:b/interface-with-dead-type")?;
+                Ok(())
+            }
             pub fn add_to_linker<T, U>(
                 linker: &mut wasmtime::component::Linker<T>,
                 get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
@@ -115,9 +157,9 @@ pub mod a {
             where
                 U: Host,
             {
-                let mut inst = linker.instance("a:b/interface-with-dead-type")?;
-                Ok(())
+                add_to_linker_get_host(linker, get)
             }
+            impl<_T: Host + ?Sized> Host for &mut _T {}
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/dead-code_async.rs b/crates/component-macro/tests/expanded/dead-code_async.rs
index d2ef5c89377..ed7d7e401b9 100644
--- a/crates/component-macro/tests/expanded/dead-code_async.rs
+++ b/crates/component-macro/tests/expanded/dead-code_async.rs
@@ -8,9 +8,9 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
+            T: Send,
             U: a::b::interface_with_live_type::Host
                 + a::b::interface_with_dead_type::Host + Send,
-            T: Send,
         {
             a::b::interface_with_live_type::add_to_linker(linker, get)?;
             a::b::interface_with_dead_type::add_to_linker(linker, get)?;
@@ -83,46 +83,96 @@ pub mod a {
                 );
             };
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn f(&mut self) -> LiveType;
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("a:b/interface-with-live-type")?;
                 inst.func_wrap_async(
                     "f",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::f(host).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn f(&mut self) -> LiveType {
+                    Host::f(*self).await
+                }
+            }
         }
         #[allow(clippy::all)]
         pub mod interface_with_dead_type {
             #[allow(unused_imports)]
             use wasmtime::component::__internal::anyhow;
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {}
-            pub fn add_to_linker<T, U>(
+            pub trait Host: Send {}
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("a:b/interface-with-dead-type")?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {}
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/direct-import.rs b/crates/component-macro/tests/expanded/direct-import.rs
index abef9fe2088..fe627871f83 100644
--- a/crates/component-macro/tests/expanded/direct-import.rs
+++ b/crates/component-macro/tests/expanded/direct-import.rs
@@ -2,39 +2,53 @@ pub struct Foo {}
 pub trait FooImports {
     fn foo(&mut self) -> ();
 }
+pub trait FooImportsGetHost<
+    T,
+>: Fn(T) -> <Self as FooImportsGetHost<T>>::Host + Send + Sync + Copy + 'static {
+    type Host: FooImports;
+}
+impl<F, T, O> FooImportsGetHost<T> for F
+where
+    F: Fn(T) -> O + Send + Sync + Copy + 'static,
+    O: FooImports,
+{
+    type Host = O;
+}
+impl<_T: FooImports + ?Sized> FooImports for &mut _T {
+    fn foo(&mut self) -> () {
+        FooImports::foo(*self)
+    }
+}
 const _: () = {
     #[allow(unused_imports)]
     use wasmtime::component::__internal::anyhow;
     impl Foo {
-        pub fn add_to_linker<T, U>(
-            linker: &mut wasmtime::component::Linker<T>,
-            get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-        ) -> wasmtime::Result<()>
-        where
-            U: FooImports,
-        {
-            Self::add_root_to_linker(linker, get)?;
-            Ok(())
-        }
-        pub fn add_root_to_linker<T, U>(
+        pub fn add_to_linker_imports_get_host<T>(
             linker: &mut wasmtime::component::Linker<T>,
-            get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-        ) -> wasmtime::Result<()>
-        where
-            U: FooImports,
-        {
+            host_getter: impl for<'a> FooImportsGetHost<&'a mut T>,
+        ) -> wasmtime::Result<()> {
             let mut linker = linker.root();
             linker
                 .func_wrap(
                     "foo",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = FooImports::foo(host);
                         Ok(r)
                     },
                 )?;
             Ok(())
         }
+        pub fn add_to_linker<T, U>(
+            linker: &mut wasmtime::component::Linker<T>,
+            get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+        ) -> wasmtime::Result<()>
+        where
+            U: FooImports,
+        {
+            Self::add_to_linker_imports_get_host(linker, get)?;
+            Ok(())
+        }
         /// Instantiates the provided `module` using the specified
         /// parameters, wrapping up the result in a structure that
         /// translates between wasm and the host.
diff --git a/crates/component-macro/tests/expanded/direct-import_async.rs b/crates/component-macro/tests/expanded/direct-import_async.rs
index 1f6c9a6282f..de7b0490066 100644
--- a/crates/component-macro/tests/expanded/direct-import_async.rs
+++ b/crates/component-macro/tests/expanded/direct-import_async.rs
@@ -1,29 +1,35 @@
 pub struct Foo {}
 #[wasmtime::component::__internal::async_trait]
-pub trait FooImports {
+pub trait FooImports: Send {
     async fn foo(&mut self) -> ();
 }
+pub trait FooImportsGetHost<
+    T,
+>: Fn(T) -> <Self as FooImportsGetHost<T>>::Host + Send + Sync + Copy + 'static {
+    type Host: FooImports;
+}
+impl<F, T, O> FooImportsGetHost<T> for F
+where
+    F: Fn(T) -> O + Send + Sync + Copy + 'static,
+    O: FooImports,
+{
+    type Host = O;
+}
+#[wasmtime::component::__internal::async_trait]
+impl<_T: FooImports + ?Sized + Send> FooImports for &mut _T {
+    async fn foo(&mut self) -> () {
+        FooImports::foo(*self).await
+    }
+}
 const _: () = {
     #[allow(unused_imports)]
     use wasmtime::component::__internal::anyhow;
     impl Foo {
-        pub fn add_to_linker<T, U>(
+        pub fn add_to_linker_imports_get_host<T>(
             linker: &mut wasmtime::component::Linker<T>,
-            get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            host_getter: impl for<'a> FooImportsGetHost<&'a mut T>,
         ) -> wasmtime::Result<()>
         where
-            U: FooImports + Send,
-            T: Send,
-        {
-            Self::add_root_to_linker(linker, get)?;
-            Ok(())
-        }
-        pub fn add_root_to_linker<T, U>(
-            linker: &mut wasmtime::component::Linker<T>,
-            get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-        ) -> wasmtime::Result<()>
-        where
-            U: FooImports + Send,
             T: Send,
         {
             let mut linker = linker.root();
@@ -31,13 +37,24 @@ const _: () = {
                 .func_wrap_async(
                     "foo",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = FooImports::foo(host).await;
                         Ok(r)
                     }),
                 )?;
             Ok(())
         }
+        pub fn add_to_linker<T, U>(
+            linker: &mut wasmtime::component::Linker<T>,
+            get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+        ) -> wasmtime::Result<()>
+        where
+            T: Send,
+            U: FooImports + Send,
+        {
+            Self::add_to_linker_imports_get_host(linker, get)?;
+            Ok(())
+        }
         /// Instantiates the provided `module` using the specified
         /// parameters, wrapping up the result in a structure that
         /// translates between wasm and the host.
diff --git a/crates/component-macro/tests/expanded/flags.rs b/crates/component-macro/tests/expanded/flags.rs
index 48b4929acce..d718d765056 100644
--- a/crates/component-macro/tests/expanded/flags.rs
+++ b/crates/component-macro/tests/expanded/flags.rs
@@ -194,13 +194,22 @@ pub mod foo {
                 fn roundtrip_flag32(&mut self, x: Flag32) -> Flag32;
                 fn roundtrip_flag64(&mut self, x: Flag64) -> Flag64;
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/flegs")?;
                 inst.func_wrap(
                     "roundtrip-flag1",
@@ -208,7 +217,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Flag1,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::roundtrip_flag1(host, arg0);
                         Ok((r,))
                     },
@@ -219,7 +228,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Flag2,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::roundtrip_flag2(host, arg0);
                         Ok((r,))
                     },
@@ -230,7 +239,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Flag4,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::roundtrip_flag4(host, arg0);
                         Ok((r,))
                     },
@@ -241,7 +250,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Flag8,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::roundtrip_flag8(host, arg0);
                         Ok((r,))
                     },
@@ -252,7 +261,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Flag16,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::roundtrip_flag16(host, arg0);
                         Ok((r,))
                     },
@@ -263,7 +272,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Flag32,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::roundtrip_flag32(host, arg0);
                         Ok((r,))
                     },
@@ -274,13 +283,45 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Flag64,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::roundtrip_flag64(host, arg0);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn roundtrip_flag1(&mut self, x: Flag1) -> Flag1 {
+                    Host::roundtrip_flag1(*self, x)
+                }
+                fn roundtrip_flag2(&mut self, x: Flag2) -> Flag2 {
+                    Host::roundtrip_flag2(*self, x)
+                }
+                fn roundtrip_flag4(&mut self, x: Flag4) -> Flag4 {
+                    Host::roundtrip_flag4(*self, x)
+                }
+                fn roundtrip_flag8(&mut self, x: Flag8) -> Flag8 {
+                    Host::roundtrip_flag8(*self, x)
+                }
+                fn roundtrip_flag16(&mut self, x: Flag16) -> Flag16 {
+                    Host::roundtrip_flag16(*self, x)
+                }
+                fn roundtrip_flag32(&mut self, x: Flag32) -> Flag32 {
+                    Host::roundtrip_flag32(*self, x)
+                }
+                fn roundtrip_flag64(&mut self, x: Flag64) -> Flag64 {
+                    Host::roundtrip_flag64(*self, x)
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/flags_async.rs b/crates/component-macro/tests/expanded/flags_async.rs
index 40e90b2121c..34b93a1c2cc 100644
--- a/crates/component-macro/tests/expanded/flags_async.rs
+++ b/crates/component-macro/tests/expanded/flags_async.rs
@@ -10,8 +10,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::flegs::Host + Send,
             T: Send,
+            U: foo::foo::flegs::Host + Send,
         {
             foo::foo::flegs::add_to_linker(linker, get)?;
             Ok(())
@@ -187,7 +187,7 @@ pub mod foo {
                 assert!(4 == < Flag64 as wasmtime::component::ComponentType >::ALIGN32);
             };
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn roundtrip_flag1(&mut self, x: Flag1) -> Flag1;
                 async fn roundtrip_flag2(&mut self, x: Flag2) -> Flag2;
                 async fn roundtrip_flag4(&mut self, x: Flag4) -> Flag4;
@@ -196,13 +196,24 @@ pub mod foo {
                 async fn roundtrip_flag32(&mut self, x: Flag32) -> Flag32;
                 async fn roundtrip_flag64(&mut self, x: Flag64) -> Flag64;
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/flegs")?;
                 inst.func_wrap_async(
@@ -211,7 +222,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Flag1,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::roundtrip_flag1(host, arg0).await;
                         Ok((r,))
                     }),
@@ -222,7 +233,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Flag2,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::roundtrip_flag2(host, arg0).await;
                         Ok((r,))
                     }),
@@ -233,7 +244,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Flag4,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::roundtrip_flag4(host, arg0).await;
                         Ok((r,))
                     }),
@@ -244,7 +255,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Flag8,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::roundtrip_flag8(host, arg0).await;
                         Ok((r,))
                     }),
@@ -255,7 +266,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Flag16,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::roundtrip_flag16(host, arg0).await;
                         Ok((r,))
                     }),
@@ -266,7 +277,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Flag32,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::roundtrip_flag32(host, arg0).await;
                         Ok((r,))
                     }),
@@ -277,13 +288,47 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Flag64,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::roundtrip_flag64(host, arg0).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn roundtrip_flag1(&mut self, x: Flag1) -> Flag1 {
+                    Host::roundtrip_flag1(*self, x).await
+                }
+                async fn roundtrip_flag2(&mut self, x: Flag2) -> Flag2 {
+                    Host::roundtrip_flag2(*self, x).await
+                }
+                async fn roundtrip_flag4(&mut self, x: Flag4) -> Flag4 {
+                    Host::roundtrip_flag4(*self, x).await
+                }
+                async fn roundtrip_flag8(&mut self, x: Flag8) -> Flag8 {
+                    Host::roundtrip_flag8(*self, x).await
+                }
+                async fn roundtrip_flag16(&mut self, x: Flag16) -> Flag16 {
+                    Host::roundtrip_flag16(*self, x).await
+                }
+                async fn roundtrip_flag32(&mut self, x: Flag32) -> Flag32 {
+                    Host::roundtrip_flag32(*self, x).await
+                }
+                async fn roundtrip_flag64(&mut self, x: Flag64) -> Flag64 {
+                    Host::roundtrip_flag64(*self, x).await
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/floats.rs b/crates/component-macro/tests/expanded/floats.rs
index 7c7f2d02ce5..eacca26c064 100644
--- a/crates/component-macro/tests/expanded/floats.rs
+++ b/crates/component-macro/tests/expanded/floats.rs
@@ -77,18 +77,27 @@ pub mod foo {
                 fn float32_result(&mut self) -> f32;
                 fn float64_result(&mut self) -> f64;
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/floats")?;
                 inst.func_wrap(
                     "float32-param",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (f32,)| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::float32_param(host, arg0);
                         Ok(r)
                     },
@@ -96,7 +105,7 @@ pub mod foo {
                 inst.func_wrap(
                     "float64-param",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (f64,)| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::float64_param(host, arg0);
                         Ok(r)
                     },
@@ -104,7 +113,7 @@ pub mod foo {
                 inst.func_wrap(
                     "float32-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::float32_result(host);
                         Ok((r,))
                     },
@@ -112,13 +121,36 @@ pub mod foo {
                 inst.func_wrap(
                     "float64-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::float64_result(host);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn float32_param(&mut self, x: f32) -> () {
+                    Host::float32_param(*self, x)
+                }
+                fn float64_param(&mut self, x: f64) -> () {
+                    Host::float64_param(*self, x)
+                }
+                fn float32_result(&mut self) -> f32 {
+                    Host::float32_result(*self)
+                }
+                fn float64_result(&mut self) -> f64 {
+                    Host::float64_result(*self)
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/floats_async.rs b/crates/component-macro/tests/expanded/floats_async.rs
index 3dd8afe7f2c..bddb518bb3e 100644
--- a/crates/component-macro/tests/expanded/floats_async.rs
+++ b/crates/component-macro/tests/expanded/floats_async.rs
@@ -10,8 +10,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::floats::Host + Send,
             T: Send,
+            U: foo::foo::floats::Host + Send,
         {
             foo::foo::floats::add_to_linker(linker, get)?;
             Ok(())
@@ -73,25 +73,36 @@ pub mod foo {
             #[allow(unused_imports)]
             use wasmtime::component::__internal::anyhow;
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn float32_param(&mut self, x: f32) -> ();
                 async fn float64_param(&mut self, x: f64) -> ();
                 async fn float32_result(&mut self) -> f32;
                 async fn float64_result(&mut self) -> f64;
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/floats")?;
                 inst.func_wrap_async(
                     "float32-param",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (f32,)| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::float32_param(host, arg0).await;
                         Ok(r)
                     }),
@@ -99,7 +110,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "float64-param",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (f64,)| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::float64_param(host, arg0).await;
                         Ok(r)
                     }),
@@ -107,7 +118,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "float32-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::float32_result(host).await;
                         Ok((r,))
                     }),
@@ -115,13 +126,38 @@ pub mod foo {
                 inst.func_wrap_async(
                     "float64-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::float64_result(host).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn float32_param(&mut self, x: f32) -> () {
+                    Host::float32_param(*self, x).await
+                }
+                async fn float64_param(&mut self, x: f64) -> () {
+                    Host::float64_param(*self, x).await
+                }
+                async fn float32_result(&mut self) -> f32 {
+                    Host::float32_result(*self).await
+                }
+                async fn float64_result(&mut self) -> f64 {
+                    Host::float64_result(*self).await
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/integers.rs b/crates/component-macro/tests/expanded/integers.rs
index 8ae8fae0781..1d36e4cdcfa 100644
--- a/crates/component-macro/tests/expanded/integers.rs
+++ b/crates/component-macro/tests/expanded/integers.rs
@@ -103,18 +103,27 @@ pub mod foo {
                 fn r8(&mut self) -> i64;
                 fn pair_ret(&mut self) -> (i64, u8);
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/integers")?;
                 inst.func_wrap(
                     "a1",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (u8,)| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a1(host, arg0);
                         Ok(r)
                     },
@@ -122,7 +131,7 @@ pub mod foo {
                 inst.func_wrap(
                     "a2",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (i8,)| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a2(host, arg0);
                         Ok(r)
                     },
@@ -130,7 +139,7 @@ pub mod foo {
                 inst.func_wrap(
                     "a3",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (u16,)| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a3(host, arg0);
                         Ok(r)
                     },
@@ -138,7 +147,7 @@ pub mod foo {
                 inst.func_wrap(
                     "a4",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (i16,)| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a4(host, arg0);
                         Ok(r)
                     },
@@ -146,7 +155,7 @@ pub mod foo {
                 inst.func_wrap(
                     "a5",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (u32,)| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a5(host, arg0);
                         Ok(r)
                     },
@@ -154,7 +163,7 @@ pub mod foo {
                 inst.func_wrap(
                     "a6",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (i32,)| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a6(host, arg0);
                         Ok(r)
                     },
@@ -162,7 +171,7 @@ pub mod foo {
                 inst.func_wrap(
                     "a7",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (u64,)| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a7(host, arg0);
                         Ok(r)
                     },
@@ -170,7 +179,7 @@ pub mod foo {
                 inst.func_wrap(
                     "a8",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (i64,)| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a8(host, arg0);
                         Ok(r)
                     },
@@ -190,7 +199,7 @@ pub mod foo {
                             arg7,
                         ): (u8, i8, u16, i16, u32, i32, u64, i64)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a9(
                             host,
                             arg0,
@@ -208,7 +217,7 @@ pub mod foo {
                 inst.func_wrap(
                     "r1",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::r1(host);
                         Ok((r,))
                     },
@@ -216,7 +225,7 @@ pub mod foo {
                 inst.func_wrap(
                     "r2",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::r2(host);
                         Ok((r,))
                     },
@@ -224,7 +233,7 @@ pub mod foo {
                 inst.func_wrap(
                     "r3",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::r3(host);
                         Ok((r,))
                     },
@@ -232,7 +241,7 @@ pub mod foo {
                 inst.func_wrap(
                     "r4",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::r4(host);
                         Ok((r,))
                     },
@@ -240,7 +249,7 @@ pub mod foo {
                 inst.func_wrap(
                     "r5",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::r5(host);
                         Ok((r,))
                     },
@@ -248,7 +257,7 @@ pub mod foo {
                 inst.func_wrap(
                     "r6",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::r6(host);
                         Ok((r,))
                     },
@@ -256,7 +265,7 @@ pub mod foo {
                 inst.func_wrap(
                     "r7",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::r7(host);
                         Ok((r,))
                     },
@@ -264,7 +273,7 @@ pub mod foo {
                 inst.func_wrap(
                     "r8",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::r8(host);
                         Ok((r,))
                     },
@@ -272,13 +281,88 @@ pub mod foo {
                 inst.func_wrap(
                     "pair-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::pair_ret(host);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn a1(&mut self, x: u8) -> () {
+                    Host::a1(*self, x)
+                }
+                fn a2(&mut self, x: i8) -> () {
+                    Host::a2(*self, x)
+                }
+                fn a3(&mut self, x: u16) -> () {
+                    Host::a3(*self, x)
+                }
+                fn a4(&mut self, x: i16) -> () {
+                    Host::a4(*self, x)
+                }
+                fn a5(&mut self, x: u32) -> () {
+                    Host::a5(*self, x)
+                }
+                fn a6(&mut self, x: i32) -> () {
+                    Host::a6(*self, x)
+                }
+                fn a7(&mut self, x: u64) -> () {
+                    Host::a7(*self, x)
+                }
+                fn a8(&mut self, x: i64) -> () {
+                    Host::a8(*self, x)
+                }
+                fn a9(
+                    &mut self,
+                    p1: u8,
+                    p2: i8,
+                    p3: u16,
+                    p4: i16,
+                    p5: u32,
+                    p6: i32,
+                    p7: u64,
+                    p8: i64,
+                ) -> () {
+                    Host::a9(*self, p1, p2, p3, p4, p5, p6, p7, p8)
+                }
+                fn r1(&mut self) -> u8 {
+                    Host::r1(*self)
+                }
+                fn r2(&mut self) -> i8 {
+                    Host::r2(*self)
+                }
+                fn r3(&mut self) -> u16 {
+                    Host::r3(*self)
+                }
+                fn r4(&mut self) -> i16 {
+                    Host::r4(*self)
+                }
+                fn r5(&mut self) -> u32 {
+                    Host::r5(*self)
+                }
+                fn r6(&mut self) -> i32 {
+                    Host::r6(*self)
+                }
+                fn r7(&mut self) -> u64 {
+                    Host::r7(*self)
+                }
+                fn r8(&mut self) -> i64 {
+                    Host::r8(*self)
+                }
+                fn pair_ret(&mut self) -> (i64, u8) {
+                    Host::pair_ret(*self)
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/integers_async.rs b/crates/component-macro/tests/expanded/integers_async.rs
index ab9890524ce..9bec30c59c4 100644
--- a/crates/component-macro/tests/expanded/integers_async.rs
+++ b/crates/component-macro/tests/expanded/integers_async.rs
@@ -10,8 +10,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::integers::Host + Send,
             T: Send,
+            U: foo::foo::integers::Host + Send,
         {
             foo::foo::integers::add_to_linker(linker, get)?;
             Ok(())
@@ -75,7 +75,7 @@ pub mod foo {
             #[allow(unused_imports)]
             use wasmtime::component::__internal::anyhow;
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn a1(&mut self, x: u8) -> ();
                 async fn a2(&mut self, x: i8) -> ();
                 async fn a3(&mut self, x: u16) -> ();
@@ -105,19 +105,30 @@ pub mod foo {
                 async fn r8(&mut self) -> i64;
                 async fn pair_ret(&mut self) -> (i64, u8);
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/integers")?;
                 inst.func_wrap_async(
                     "a1",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (u8,)| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a1(host, arg0).await;
                         Ok(r)
                     }),
@@ -125,7 +136,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "a2",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (i8,)| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a2(host, arg0).await;
                         Ok(r)
                     }),
@@ -133,7 +144,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "a3",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (u16,)| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a3(host, arg0).await;
                         Ok(r)
                     }),
@@ -141,7 +152,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "a4",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (i16,)| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a4(host, arg0).await;
                         Ok(r)
                     }),
@@ -149,7 +160,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "a5",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (u32,)| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a5(host, arg0).await;
                         Ok(r)
                     }),
@@ -157,7 +168,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "a6",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (i32,)| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a6(host, arg0).await;
                         Ok(r)
                     }),
@@ -165,7 +176,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "a7",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (u64,)| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a7(host, arg0).await;
                         Ok(r)
                     }),
@@ -173,7 +184,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "a8",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (i64,)| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a8(host, arg0).await;
                         Ok(r)
                     }),
@@ -193,7 +204,7 @@ pub mod foo {
                             arg7,
                         ): (u8, i8, u16, i16, u32, i32, u64, i64)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a9(
                                 host,
                                 arg0,
@@ -212,7 +223,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "r1",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::r1(host).await;
                         Ok((r,))
                     }),
@@ -220,7 +231,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "r2",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::r2(host).await;
                         Ok((r,))
                     }),
@@ -228,7 +239,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "r3",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::r3(host).await;
                         Ok((r,))
                     }),
@@ -236,7 +247,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "r4",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::r4(host).await;
                         Ok((r,))
                     }),
@@ -244,7 +255,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "r5",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::r5(host).await;
                         Ok((r,))
                     }),
@@ -252,7 +263,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "r6",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::r6(host).await;
                         Ok((r,))
                     }),
@@ -260,7 +271,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "r7",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::r7(host).await;
                         Ok((r,))
                     }),
@@ -268,7 +279,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "r8",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::r8(host).await;
                         Ok((r,))
                     }),
@@ -276,13 +287,90 @@ pub mod foo {
                 inst.func_wrap_async(
                     "pair-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::pair_ret(host).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn a1(&mut self, x: u8) -> () {
+                    Host::a1(*self, x).await
+                }
+                async fn a2(&mut self, x: i8) -> () {
+                    Host::a2(*self, x).await
+                }
+                async fn a3(&mut self, x: u16) -> () {
+                    Host::a3(*self, x).await
+                }
+                async fn a4(&mut self, x: i16) -> () {
+                    Host::a4(*self, x).await
+                }
+                async fn a5(&mut self, x: u32) -> () {
+                    Host::a5(*self, x).await
+                }
+                async fn a6(&mut self, x: i32) -> () {
+                    Host::a6(*self, x).await
+                }
+                async fn a7(&mut self, x: u64) -> () {
+                    Host::a7(*self, x).await
+                }
+                async fn a8(&mut self, x: i64) -> () {
+                    Host::a8(*self, x).await
+                }
+                async fn a9(
+                    &mut self,
+                    p1: u8,
+                    p2: i8,
+                    p3: u16,
+                    p4: i16,
+                    p5: u32,
+                    p6: i32,
+                    p7: u64,
+                    p8: i64,
+                ) -> () {
+                    Host::a9(*self, p1, p2, p3, p4, p5, p6, p7, p8).await
+                }
+                async fn r1(&mut self) -> u8 {
+                    Host::r1(*self).await
+                }
+                async fn r2(&mut self) -> i8 {
+                    Host::r2(*self).await
+                }
+                async fn r3(&mut self) -> u16 {
+                    Host::r3(*self).await
+                }
+                async fn r4(&mut self) -> i16 {
+                    Host::r4(*self).await
+                }
+                async fn r5(&mut self) -> u32 {
+                    Host::r5(*self).await
+                }
+                async fn r6(&mut self) -> i32 {
+                    Host::r6(*self).await
+                }
+                async fn r7(&mut self) -> u64 {
+                    Host::r7(*self).await
+                }
+                async fn r8(&mut self) -> i64 {
+                    Host::r8(*self).await
+                }
+                async fn pair_ret(&mut self) -> (i64, u8) {
+                    Host::pair_ret(*self).await
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/lists.rs b/crates/component-macro/tests/expanded/lists.rs
index 0160d6deb95..e404f16c9a1 100644
--- a/crates/component-macro/tests/expanded/lists.rs
+++ b/crates/component-macro/tests/expanded/lists.rs
@@ -354,13 +354,22 @@ pub mod foo {
                     a: LoadStoreAllSizes,
                 ) -> LoadStoreAllSizes;
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/lists")?;
                 inst.func_wrap(
                     "list-u8-param",
@@ -368,7 +377,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<u8>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_u8_param(host, arg0);
                         Ok(r)
                     },
@@ -379,7 +388,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<u16>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_u16_param(host, arg0);
                         Ok(r)
                     },
@@ -390,7 +399,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<u32>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_u32_param(host, arg0);
                         Ok(r)
                     },
@@ -401,7 +410,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<u64>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_u64_param(host, arg0);
                         Ok(r)
                     },
@@ -412,7 +421,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<i8>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_s8_param(host, arg0);
                         Ok(r)
                     },
@@ -423,7 +432,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<i16>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_s16_param(host, arg0);
                         Ok(r)
                     },
@@ -434,7 +443,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<i32>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_s32_param(host, arg0);
                         Ok(r)
                     },
@@ -445,7 +454,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<i64>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_s64_param(host, arg0);
                         Ok(r)
                     },
@@ -456,7 +465,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<f32>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_float32_param(host, arg0);
                         Ok(r)
                     },
@@ -467,7 +476,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<f64>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_float64_param(host, arg0);
                         Ok(r)
                     },
@@ -475,7 +484,7 @@ pub mod foo {
                 inst.func_wrap(
                     "list-u8-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_u8_ret(host);
                         Ok((r,))
                     },
@@ -483,7 +492,7 @@ pub mod foo {
                 inst.func_wrap(
                     "list-u16-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_u16_ret(host);
                         Ok((r,))
                     },
@@ -491,7 +500,7 @@ pub mod foo {
                 inst.func_wrap(
                     "list-u32-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_u32_ret(host);
                         Ok((r,))
                     },
@@ -499,7 +508,7 @@ pub mod foo {
                 inst.func_wrap(
                     "list-u64-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_u64_ret(host);
                         Ok((r,))
                     },
@@ -507,7 +516,7 @@ pub mod foo {
                 inst.func_wrap(
                     "list-s8-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_s8_ret(host);
                         Ok((r,))
                     },
@@ -515,7 +524,7 @@ pub mod foo {
                 inst.func_wrap(
                     "list-s16-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_s16_ret(host);
                         Ok((r,))
                     },
@@ -523,7 +532,7 @@ pub mod foo {
                 inst.func_wrap(
                     "list-s32-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_s32_ret(host);
                         Ok((r,))
                     },
@@ -531,7 +540,7 @@ pub mod foo {
                 inst.func_wrap(
                     "list-s64-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_s64_ret(host);
                         Ok((r,))
                     },
@@ -539,7 +548,7 @@ pub mod foo {
                 inst.func_wrap(
                     "list-float32-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_float32_ret(host);
                         Ok((r,))
                     },
@@ -547,7 +556,7 @@ pub mod foo {
                 inst.func_wrap(
                     "list-float64-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_float64_ret(host);
                         Ok((r,))
                     },
@@ -558,7 +567,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<(u8, i8)>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::tuple_list(host, arg0);
                         Ok((r,))
                     },
@@ -575,7 +584,7 @@ pub mod foo {
                             >,
                         )|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::string_list_arg(host, arg0);
                         Ok(r)
                     },
@@ -583,7 +592,7 @@ pub mod foo {
                 inst.func_wrap(
                     "string-list-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::string_list_ret(host);
                         Ok((r,))
                     },
@@ -600,7 +609,7 @@ pub mod foo {
                             >,
                         )|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::tuple_string_list(host, arg0);
                         Ok((r,))
                     },
@@ -617,7 +626,7 @@ pub mod foo {
                             >,
                         )|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::string_list(host, arg0);
                         Ok((r,))
                     },
@@ -628,7 +637,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<SomeRecord>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::record_list(host, arg0);
                         Ok((r,))
                     },
@@ -639,7 +648,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<OtherRecord>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::record_list_reverse(host, arg0);
                         Ok((r,))
                     },
@@ -650,7 +659,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<SomeVariant>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::variant_list(host, arg0);
                         Ok((r,))
                     },
@@ -661,13 +670,183 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (LoadStoreAllSizes,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::load_store_everything(host, arg0);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn list_u8_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<u8>,
+                ) -> () {
+                    Host::list_u8_param(*self, x)
+                }
+                fn list_u16_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<u16>,
+                ) -> () {
+                    Host::list_u16_param(*self, x)
+                }
+                fn list_u32_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<u32>,
+                ) -> () {
+                    Host::list_u32_param(*self, x)
+                }
+                fn list_u64_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<u64>,
+                ) -> () {
+                    Host::list_u64_param(*self, x)
+                }
+                fn list_s8_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<i8>,
+                ) -> () {
+                    Host::list_s8_param(*self, x)
+                }
+                fn list_s16_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<i16>,
+                ) -> () {
+                    Host::list_s16_param(*self, x)
+                }
+                fn list_s32_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<i32>,
+                ) -> () {
+                    Host::list_s32_param(*self, x)
+                }
+                fn list_s64_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<i64>,
+                ) -> () {
+                    Host::list_s64_param(*self, x)
+                }
+                fn list_float32_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<f32>,
+                ) -> () {
+                    Host::list_float32_param(*self, x)
+                }
+                fn list_float64_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<f64>,
+                ) -> () {
+                    Host::list_float64_param(*self, x)
+                }
+                fn list_u8_ret(&mut self) -> wasmtime::component::__internal::Vec<u8> {
+                    Host::list_u8_ret(*self)
+                }
+                fn list_u16_ret(&mut self) -> wasmtime::component::__internal::Vec<u16> {
+                    Host::list_u16_ret(*self)
+                }
+                fn list_u32_ret(&mut self) -> wasmtime::component::__internal::Vec<u32> {
+                    Host::list_u32_ret(*self)
+                }
+                fn list_u64_ret(&mut self) -> wasmtime::component::__internal::Vec<u64> {
+                    Host::list_u64_ret(*self)
+                }
+                fn list_s8_ret(&mut self) -> wasmtime::component::__internal::Vec<i8> {
+                    Host::list_s8_ret(*self)
+                }
+                fn list_s16_ret(&mut self) -> wasmtime::component::__internal::Vec<i16> {
+                    Host::list_s16_ret(*self)
+                }
+                fn list_s32_ret(&mut self) -> wasmtime::component::__internal::Vec<i32> {
+                    Host::list_s32_ret(*self)
+                }
+                fn list_s64_ret(&mut self) -> wasmtime::component::__internal::Vec<i64> {
+                    Host::list_s64_ret(*self)
+                }
+                fn list_float32_ret(
+                    &mut self,
+                ) -> wasmtime::component::__internal::Vec<f32> {
+                    Host::list_float32_ret(*self)
+                }
+                fn list_float64_ret(
+                    &mut self,
+                ) -> wasmtime::component::__internal::Vec<f64> {
+                    Host::list_float64_ret(*self)
+                }
+                fn tuple_list(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<(u8, i8)>,
+                ) -> wasmtime::component::__internal::Vec<(i64, u32)> {
+                    Host::tuple_list(*self, x)
+                }
+                fn string_list_arg(
+                    &mut self,
+                    a: wasmtime::component::__internal::Vec<
+                        wasmtime::component::__internal::String,
+                    >,
+                ) -> () {
+                    Host::string_list_arg(*self, a)
+                }
+                fn string_list_ret(
+                    &mut self,
+                ) -> wasmtime::component::__internal::Vec<
+                    wasmtime::component::__internal::String,
+                > {
+                    Host::string_list_ret(*self)
+                }
+                fn tuple_string_list(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<
+                        (u8, wasmtime::component::__internal::String),
+                    >,
+                ) -> wasmtime::component::__internal::Vec<
+                    (wasmtime::component::__internal::String, u8),
+                > {
+                    Host::tuple_string_list(*self, x)
+                }
+                fn string_list(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<
+                        wasmtime::component::__internal::String,
+                    >,
+                ) -> wasmtime::component::__internal::Vec<
+                    wasmtime::component::__internal::String,
+                > {
+                    Host::string_list(*self, x)
+                }
+                fn record_list(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<SomeRecord>,
+                ) -> wasmtime::component::__internal::Vec<OtherRecord> {
+                    Host::record_list(*self, x)
+                }
+                fn record_list_reverse(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<OtherRecord>,
+                ) -> wasmtime::component::__internal::Vec<SomeRecord> {
+                    Host::record_list_reverse(*self, x)
+                }
+                fn variant_list(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<SomeVariant>,
+                ) -> wasmtime::component::__internal::Vec<OtherVariant> {
+                    Host::variant_list(*self, x)
+                }
+                fn load_store_everything(
+                    &mut self,
+                    a: LoadStoreAllSizes,
+                ) -> LoadStoreAllSizes {
+                    Host::load_store_everything(*self, a)
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/lists_async.rs b/crates/component-macro/tests/expanded/lists_async.rs
index 94037381a11..9692a90682a 100644
--- a/crates/component-macro/tests/expanded/lists_async.rs
+++ b/crates/component-macro/tests/expanded/lists_async.rs
@@ -10,8 +10,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::lists::Host + Send,
             T: Send,
+            U: foo::foo::lists::Host + Send,
         {
             foo::foo::lists::add_to_linker(linker, get)?;
             Ok(())
@@ -253,7 +253,7 @@ pub mod foo {
                 );
             };
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn list_u8_param(
                     &mut self,
                     x: wasmtime::component::__internal::Vec<u8>,
@@ -372,13 +372,24 @@ pub mod foo {
                     a: LoadStoreAllSizes,
                 ) -> LoadStoreAllSizes;
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/lists")?;
                 inst.func_wrap_async(
@@ -387,7 +398,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<u8>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_u8_param(host, arg0).await;
                         Ok(r)
                     }),
@@ -398,7 +409,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<u16>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_u16_param(host, arg0).await;
                         Ok(r)
                     }),
@@ -409,7 +420,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<u32>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_u32_param(host, arg0).await;
                         Ok(r)
                     }),
@@ -420,7 +431,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<u64>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_u64_param(host, arg0).await;
                         Ok(r)
                     }),
@@ -431,7 +442,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<i8>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_s8_param(host, arg0).await;
                         Ok(r)
                     }),
@@ -442,7 +453,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<i16>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_s16_param(host, arg0).await;
                         Ok(r)
                     }),
@@ -453,7 +464,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<i32>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_s32_param(host, arg0).await;
                         Ok(r)
                     }),
@@ -464,7 +475,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<i64>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_s64_param(host, arg0).await;
                         Ok(r)
                     }),
@@ -475,7 +486,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<f32>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_float32_param(host, arg0).await;
                         Ok(r)
                     }),
@@ -486,7 +497,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<f64>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_float64_param(host, arg0).await;
                         Ok(r)
                     }),
@@ -494,7 +505,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "list-u8-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_u8_ret(host).await;
                         Ok((r,))
                     }),
@@ -502,7 +513,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "list-u16-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_u16_ret(host).await;
                         Ok((r,))
                     }),
@@ -510,7 +521,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "list-u32-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_u32_ret(host).await;
                         Ok((r,))
                     }),
@@ -518,7 +529,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "list-u64-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_u64_ret(host).await;
                         Ok((r,))
                     }),
@@ -526,7 +537,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "list-s8-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_s8_ret(host).await;
                         Ok((r,))
                     }),
@@ -534,7 +545,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "list-s16-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_s16_ret(host).await;
                         Ok((r,))
                     }),
@@ -542,7 +553,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "list-s32-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_s32_ret(host).await;
                         Ok((r,))
                     }),
@@ -550,7 +561,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "list-s64-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_s64_ret(host).await;
                         Ok((r,))
                     }),
@@ -558,7 +569,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "list-float32-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_float32_ret(host).await;
                         Ok((r,))
                     }),
@@ -566,7 +577,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "list-float64-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_float64_ret(host).await;
                         Ok((r,))
                     }),
@@ -577,7 +588,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<(u8, i8)>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::tuple_list(host, arg0).await;
                         Ok((r,))
                     }),
@@ -594,7 +605,7 @@ pub mod foo {
                             >,
                         )|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::string_list_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -602,7 +613,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "string-list-ret",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::string_list_ret(host).await;
                         Ok((r,))
                     }),
@@ -619,7 +630,7 @@ pub mod foo {
                             >,
                         )|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::tuple_string_list(host, arg0).await;
                         Ok((r,))
                     }),
@@ -636,7 +647,7 @@ pub mod foo {
                             >,
                         )|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::string_list(host, arg0).await;
                         Ok((r,))
                     }),
@@ -647,7 +658,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<SomeRecord>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::record_list(host, arg0).await;
                         Ok((r,))
                     }),
@@ -658,7 +669,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<OtherRecord>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::record_list_reverse(host, arg0).await;
                         Ok((r,))
                     }),
@@ -669,7 +680,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<SomeVariant>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::variant_list(host, arg0).await;
                         Ok((r,))
                     }),
@@ -680,13 +691,201 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (LoadStoreAllSizes,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::load_store_everything(host, arg0).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn list_u8_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<u8>,
+                ) -> () {
+                    Host::list_u8_param(*self, x).await
+                }
+                async fn list_u16_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<u16>,
+                ) -> () {
+                    Host::list_u16_param(*self, x).await
+                }
+                async fn list_u32_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<u32>,
+                ) -> () {
+                    Host::list_u32_param(*self, x).await
+                }
+                async fn list_u64_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<u64>,
+                ) -> () {
+                    Host::list_u64_param(*self, x).await
+                }
+                async fn list_s8_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<i8>,
+                ) -> () {
+                    Host::list_s8_param(*self, x).await
+                }
+                async fn list_s16_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<i16>,
+                ) -> () {
+                    Host::list_s16_param(*self, x).await
+                }
+                async fn list_s32_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<i32>,
+                ) -> () {
+                    Host::list_s32_param(*self, x).await
+                }
+                async fn list_s64_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<i64>,
+                ) -> () {
+                    Host::list_s64_param(*self, x).await
+                }
+                async fn list_float32_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<f32>,
+                ) -> () {
+                    Host::list_float32_param(*self, x).await
+                }
+                async fn list_float64_param(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<f64>,
+                ) -> () {
+                    Host::list_float64_param(*self, x).await
+                }
+                async fn list_u8_ret(
+                    &mut self,
+                ) -> wasmtime::component::__internal::Vec<u8> {
+                    Host::list_u8_ret(*self).await
+                }
+                async fn list_u16_ret(
+                    &mut self,
+                ) -> wasmtime::component::__internal::Vec<u16> {
+                    Host::list_u16_ret(*self).await
+                }
+                async fn list_u32_ret(
+                    &mut self,
+                ) -> wasmtime::component::__internal::Vec<u32> {
+                    Host::list_u32_ret(*self).await
+                }
+                async fn list_u64_ret(
+                    &mut self,
+                ) -> wasmtime::component::__internal::Vec<u64> {
+                    Host::list_u64_ret(*self).await
+                }
+                async fn list_s8_ret(
+                    &mut self,
+                ) -> wasmtime::component::__internal::Vec<i8> {
+                    Host::list_s8_ret(*self).await
+                }
+                async fn list_s16_ret(
+                    &mut self,
+                ) -> wasmtime::component::__internal::Vec<i16> {
+                    Host::list_s16_ret(*self).await
+                }
+                async fn list_s32_ret(
+                    &mut self,
+                ) -> wasmtime::component::__internal::Vec<i32> {
+                    Host::list_s32_ret(*self).await
+                }
+                async fn list_s64_ret(
+                    &mut self,
+                ) -> wasmtime::component::__internal::Vec<i64> {
+                    Host::list_s64_ret(*self).await
+                }
+                async fn list_float32_ret(
+                    &mut self,
+                ) -> wasmtime::component::__internal::Vec<f32> {
+                    Host::list_float32_ret(*self).await
+                }
+                async fn list_float64_ret(
+                    &mut self,
+                ) -> wasmtime::component::__internal::Vec<f64> {
+                    Host::list_float64_ret(*self).await
+                }
+                async fn tuple_list(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<(u8, i8)>,
+                ) -> wasmtime::component::__internal::Vec<(i64, u32)> {
+                    Host::tuple_list(*self, x).await
+                }
+                async fn string_list_arg(
+                    &mut self,
+                    a: wasmtime::component::__internal::Vec<
+                        wasmtime::component::__internal::String,
+                    >,
+                ) -> () {
+                    Host::string_list_arg(*self, a).await
+                }
+                async fn string_list_ret(
+                    &mut self,
+                ) -> wasmtime::component::__internal::Vec<
+                    wasmtime::component::__internal::String,
+                > {
+                    Host::string_list_ret(*self).await
+                }
+                async fn tuple_string_list(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<
+                        (u8, wasmtime::component::__internal::String),
+                    >,
+                ) -> wasmtime::component::__internal::Vec<
+                    (wasmtime::component::__internal::String, u8),
+                > {
+                    Host::tuple_string_list(*self, x).await
+                }
+                async fn string_list(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<
+                        wasmtime::component::__internal::String,
+                    >,
+                ) -> wasmtime::component::__internal::Vec<
+                    wasmtime::component::__internal::String,
+                > {
+                    Host::string_list(*self, x).await
+                }
+                async fn record_list(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<SomeRecord>,
+                ) -> wasmtime::component::__internal::Vec<OtherRecord> {
+                    Host::record_list(*self, x).await
+                }
+                async fn record_list_reverse(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<OtherRecord>,
+                ) -> wasmtime::component::__internal::Vec<SomeRecord> {
+                    Host::record_list_reverse(*self, x).await
+                }
+                async fn variant_list(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<SomeVariant>,
+                ) -> wasmtime::component::__internal::Vec<OtherVariant> {
+                    Host::variant_list(*self, x).await
+                }
+                async fn load_store_everything(
+                    &mut self,
+                    a: LoadStoreAllSizes,
+                ) -> LoadStoreAllSizes {
+                    Host::load_store_everything(*self, a).await
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/many-arguments.rs b/crates/component-macro/tests/expanded/many-arguments.rs
index e3b55ac5778..0d738e7aeba 100644
--- a/crates/component-macro/tests/expanded/many-arguments.rs
+++ b/crates/component-macro/tests/expanded/many-arguments.rs
@@ -176,13 +176,22 @@ pub mod foo {
                 ) -> ();
                 fn big_argument(&mut self, x: BigStruct) -> ();
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/manyarg")?;
                 inst.func_wrap(
                     "many-args",
@@ -224,7 +233,7 @@ pub mod foo {
                             u64,
                         )|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::many_args(
                             host,
                             arg0,
@@ -253,13 +262,66 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (BigStruct,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::big_argument(host, arg0);
                         Ok(r)
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn many_args(
+                    &mut self,
+                    a1: u64,
+                    a2: u64,
+                    a3: u64,
+                    a4: u64,
+                    a5: u64,
+                    a6: u64,
+                    a7: u64,
+                    a8: u64,
+                    a9: u64,
+                    a10: u64,
+                    a11: u64,
+                    a12: u64,
+                    a13: u64,
+                    a14: u64,
+                    a15: u64,
+                    a16: u64,
+                ) -> () {
+                    Host::many_args(
+                        *self,
+                        a1,
+                        a2,
+                        a3,
+                        a4,
+                        a5,
+                        a6,
+                        a7,
+                        a8,
+                        a9,
+                        a10,
+                        a11,
+                        a12,
+                        a13,
+                        a14,
+                        a15,
+                        a16,
+                    )
+                }
+                fn big_argument(&mut self, x: BigStruct) -> () {
+                    Host::big_argument(*self, x)
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/many-arguments_async.rs b/crates/component-macro/tests/expanded/many-arguments_async.rs
index 93d390d13b4..fa03d7a4766 100644
--- a/crates/component-macro/tests/expanded/many-arguments_async.rs
+++ b/crates/component-macro/tests/expanded/many-arguments_async.rs
@@ -10,8 +10,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::manyarg::Host + Send,
             T: Send,
+            U: foo::foo::manyarg::Host + Send,
         {
             foo::foo::manyarg::add_to_linker(linker, get)?;
             Ok(())
@@ -156,7 +156,7 @@ pub mod foo {
                 );
             };
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn many_args(
                     &mut self,
                     a1: u64,
@@ -178,13 +178,24 @@ pub mod foo {
                 ) -> ();
                 async fn big_argument(&mut self, x: BigStruct) -> ();
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/manyarg")?;
                 inst.func_wrap_async(
@@ -227,7 +238,7 @@ pub mod foo {
                             u64,
                         )|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::many_args(
                                 host,
                                 arg0,
@@ -257,13 +268,69 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (BigStruct,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::big_argument(host, arg0).await;
                         Ok(r)
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn many_args(
+                    &mut self,
+                    a1: u64,
+                    a2: u64,
+                    a3: u64,
+                    a4: u64,
+                    a5: u64,
+                    a6: u64,
+                    a7: u64,
+                    a8: u64,
+                    a9: u64,
+                    a10: u64,
+                    a11: u64,
+                    a12: u64,
+                    a13: u64,
+                    a14: u64,
+                    a15: u64,
+                    a16: u64,
+                ) -> () {
+                    Host::many_args(
+                            *self,
+                            a1,
+                            a2,
+                            a3,
+                            a4,
+                            a5,
+                            a6,
+                            a7,
+                            a8,
+                            a9,
+                            a10,
+                            a11,
+                            a12,
+                            a13,
+                            a14,
+                            a15,
+                            a16,
+                        )
+                        .await
+                }
+                async fn big_argument(&mut self, x: BigStruct) -> () {
+                    Host::big_argument(*self, x).await
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/multi-return.rs b/crates/component-macro/tests/expanded/multi-return.rs
index e46103e572d..abfb3c59b68 100644
--- a/crates/component-macro/tests/expanded/multi-return.rs
+++ b/crates/component-macro/tests/expanded/multi-return.rs
@@ -80,18 +80,27 @@ pub mod foo {
                 fn mrd(&mut self) -> u32;
                 fn mre(&mut self) -> (u32, f32);
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/multi-return")?;
                 inst.func_wrap(
                     "mra",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::mra(host);
                         Ok(r)
                     },
@@ -99,7 +108,7 @@ pub mod foo {
                 inst.func_wrap(
                     "mrb",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::mrb(host);
                         Ok(r)
                     },
@@ -107,7 +116,7 @@ pub mod foo {
                 inst.func_wrap(
                     "mrc",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::mrc(host);
                         Ok((r,))
                     },
@@ -115,7 +124,7 @@ pub mod foo {
                 inst.func_wrap(
                     "mrd",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::mrd(host);
                         Ok((r,))
                     },
@@ -123,13 +132,39 @@ pub mod foo {
                 inst.func_wrap(
                     "mre",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::mre(host);
                         Ok(r)
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn mra(&mut self) -> () {
+                    Host::mra(*self)
+                }
+                fn mrb(&mut self) -> () {
+                    Host::mrb(*self)
+                }
+                fn mrc(&mut self) -> u32 {
+                    Host::mrc(*self)
+                }
+                fn mrd(&mut self) -> u32 {
+                    Host::mrd(*self)
+                }
+                fn mre(&mut self) -> (u32, f32) {
+                    Host::mre(*self)
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/multi-return_async.rs b/crates/component-macro/tests/expanded/multi-return_async.rs
index f915a27f0fc..650b4f2ee67 100644
--- a/crates/component-macro/tests/expanded/multi-return_async.rs
+++ b/crates/component-macro/tests/expanded/multi-return_async.rs
@@ -10,8 +10,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::multi_return::Host + Send,
             T: Send,
+            U: foo::foo::multi_return::Host + Send,
         {
             foo::foo::multi_return::add_to_linker(linker, get)?;
             Ok(())
@@ -75,26 +75,37 @@ pub mod foo {
             #[allow(unused_imports)]
             use wasmtime::component::__internal::anyhow;
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn mra(&mut self) -> ();
                 async fn mrb(&mut self) -> ();
                 async fn mrc(&mut self) -> u32;
                 async fn mrd(&mut self) -> u32;
                 async fn mre(&mut self) -> (u32, f32);
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/multi-return")?;
                 inst.func_wrap_async(
                     "mra",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::mra(host).await;
                         Ok(r)
                     }),
@@ -102,7 +113,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "mrb",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::mrb(host).await;
                         Ok(r)
                     }),
@@ -110,7 +121,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "mrc",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::mrc(host).await;
                         Ok((r,))
                     }),
@@ -118,7 +129,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "mrd",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::mrd(host).await;
                         Ok((r,))
                     }),
@@ -126,13 +137,41 @@ pub mod foo {
                 inst.func_wrap_async(
                     "mre",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::mre(host).await;
                         Ok(r)
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn mra(&mut self) -> () {
+                    Host::mra(*self).await
+                }
+                async fn mrb(&mut self) -> () {
+                    Host::mrb(*self).await
+                }
+                async fn mrc(&mut self) -> u32 {
+                    Host::mrc(*self).await
+                }
+                async fn mrd(&mut self) -> u32 {
+                    Host::mrd(*self).await
+                }
+                async fn mre(&mut self) -> (u32, f32) {
+                    Host::mre(*self).await
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/multiversion.rs b/crates/component-macro/tests/expanded/multiversion.rs
index 7c456bed43c..72bed565d47 100644
--- a/crates/component-macro/tests/expanded/multiversion.rs
+++ b/crates/component-macro/tests/expanded/multiversion.rs
@@ -86,24 +86,47 @@ pub mod my {
             pub trait Host {
                 fn x(&mut self) -> ();
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("my:dep/a@0.1.0")?;
                 inst.func_wrap(
                     "x",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::x(host);
                         Ok(r)
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn x(&mut self) -> () {
+                    Host::x(*self)
+                }
+            }
         }
     }
     pub mod dep0_2_0 {
@@ -114,24 +137,47 @@ pub mod my {
             pub trait Host {
                 fn x(&mut self) -> ();
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("my:dep/a@0.2.0")?;
                 inst.func_wrap(
                     "x",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::x(host);
                         Ok(r)
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn x(&mut self) -> () {
+                    Host::x(*self)
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/multiversion_async.rs b/crates/component-macro/tests/expanded/multiversion_async.rs
index e0503b87cee..5c3ab925d95 100644
--- a/crates/component-macro/tests/expanded/multiversion_async.rs
+++ b/crates/component-macro/tests/expanded/multiversion_async.rs
@@ -11,8 +11,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: my::dep0_1_0::a::Host + my::dep0_2_0::a::Host + Send,
             T: Send,
+            U: my::dep0_1_0::a::Host + my::dep0_2_0::a::Host + Send,
         {
             my::dep0_1_0::a::add_to_linker(linker, get)?;
             my::dep0_2_0::a::add_to_linker(linker, get)?;
@@ -85,28 +85,55 @@ pub mod my {
             #[allow(unused_imports)]
             use wasmtime::component::__internal::anyhow;
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn x(&mut self) -> ();
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("my:dep/a@0.1.0")?;
                 inst.func_wrap_async(
                     "x",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::x(host).await;
                         Ok(r)
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn x(&mut self) -> () {
+                    Host::x(*self).await
+                }
+            }
         }
     }
     pub mod dep0_2_0 {
@@ -115,28 +142,55 @@ pub mod my {
             #[allow(unused_imports)]
             use wasmtime::component::__internal::anyhow;
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn x(&mut self) -> ();
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("my:dep/a@0.2.0")?;
                 inst.func_wrap_async(
                     "x",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::x(host).await;
                         Ok(r)
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn x(&mut self) -> () {
+                    Host::x(*self).await
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/records.rs b/crates/component-macro/tests/expanded/records.rs
index 3ad72c37162..6a8d8016eb9 100644
--- a/crates/component-macro/tests/expanded/records.rs
+++ b/crates/component-macro/tests/expanded/records.rs
@@ -232,13 +232,22 @@ pub mod foo {
                 fn aggregate_result(&mut self) -> Aggregates;
                 fn typedef_inout(&mut self, e: TupleTypedef2) -> i32;
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/records")?;
                 inst.func_wrap(
                     "tuple-arg",
@@ -246,7 +255,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): ((char, u32),)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::tuple_arg(host, arg0);
                         Ok(r)
                     },
@@ -254,7 +263,7 @@ pub mod foo {
                 inst.func_wrap(
                     "tuple-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::tuple_result(host);
                         Ok((r,))
                     },
@@ -265,7 +274,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Empty,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::empty_arg(host, arg0);
                         Ok(r)
                     },
@@ -273,7 +282,7 @@ pub mod foo {
                 inst.func_wrap(
                     "empty-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::empty_result(host);
                         Ok((r,))
                     },
@@ -284,7 +293,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Scalars,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::scalar_arg(host, arg0);
                         Ok(r)
                     },
@@ -292,7 +301,7 @@ pub mod foo {
                 inst.func_wrap(
                     "scalar-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::scalar_result(host);
                         Ok((r,))
                     },
@@ -303,7 +312,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (ReallyFlags,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::flags_arg(host, arg0);
                         Ok(r)
                     },
@@ -311,7 +320,7 @@ pub mod foo {
                 inst.func_wrap(
                     "flags-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::flags_result(host);
                         Ok((r,))
                     },
@@ -322,7 +331,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Aggregates,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::aggregate_arg(host, arg0);
                         Ok(r)
                     },
@@ -330,7 +339,7 @@ pub mod foo {
                 inst.func_wrap(
                     "aggregate-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::aggregate_result(host);
                         Ok((r,))
                     },
@@ -341,13 +350,57 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (TupleTypedef2,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::typedef_inout(host, arg0);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn tuple_arg(&mut self, x: (char, u32)) -> () {
+                    Host::tuple_arg(*self, x)
+                }
+                fn tuple_result(&mut self) -> (char, u32) {
+                    Host::tuple_result(*self)
+                }
+                fn empty_arg(&mut self, x: Empty) -> () {
+                    Host::empty_arg(*self, x)
+                }
+                fn empty_result(&mut self) -> Empty {
+                    Host::empty_result(*self)
+                }
+                fn scalar_arg(&mut self, x: Scalars) -> () {
+                    Host::scalar_arg(*self, x)
+                }
+                fn scalar_result(&mut self) -> Scalars {
+                    Host::scalar_result(*self)
+                }
+                fn flags_arg(&mut self, x: ReallyFlags) -> () {
+                    Host::flags_arg(*self, x)
+                }
+                fn flags_result(&mut self) -> ReallyFlags {
+                    Host::flags_result(*self)
+                }
+                fn aggregate_arg(&mut self, x: Aggregates) -> () {
+                    Host::aggregate_arg(*self, x)
+                }
+                fn aggregate_result(&mut self) -> Aggregates {
+                    Host::aggregate_result(*self)
+                }
+                fn typedef_inout(&mut self, e: TupleTypedef2) -> i32 {
+                    Host::typedef_inout(*self, e)
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/records_async.rs b/crates/component-macro/tests/expanded/records_async.rs
index d69a7d13d31..cc3e1e029b3 100644
--- a/crates/component-macro/tests/expanded/records_async.rs
+++ b/crates/component-macro/tests/expanded/records_async.rs
@@ -10,8 +10,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::records::Host + Send,
             T: Send,
+            U: foo::foo::records::Host + Send,
         {
             foo::foo::records::add_to_linker(linker, get)?;
             Ok(())
@@ -221,7 +221,7 @@ pub mod foo {
                 );
             };
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn tuple_arg(&mut self, x: (char, u32)) -> ();
                 async fn tuple_result(&mut self) -> (char, u32);
                 async fn empty_arg(&mut self, x: Empty) -> ();
@@ -234,13 +234,24 @@ pub mod foo {
                 async fn aggregate_result(&mut self) -> Aggregates;
                 async fn typedef_inout(&mut self, e: TupleTypedef2) -> i32;
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/records")?;
                 inst.func_wrap_async(
@@ -249,7 +260,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): ((char, u32),)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::tuple_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -257,7 +268,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "tuple-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::tuple_result(host).await;
                         Ok((r,))
                     }),
@@ -268,7 +279,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Empty,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::empty_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -276,7 +287,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "empty-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::empty_result(host).await;
                         Ok((r,))
                     }),
@@ -287,7 +298,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Scalars,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::scalar_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -295,7 +306,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "scalar-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::scalar_result(host).await;
                         Ok((r,))
                     }),
@@ -306,7 +317,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (ReallyFlags,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::flags_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -314,7 +325,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "flags-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::flags_result(host).await;
                         Ok((r,))
                     }),
@@ -325,7 +336,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Aggregates,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::aggregate_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -333,7 +344,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "aggregate-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::aggregate_result(host).await;
                         Ok((r,))
                     }),
@@ -344,13 +355,59 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (TupleTypedef2,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::typedef_inout(host, arg0).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn tuple_arg(&mut self, x: (char, u32)) -> () {
+                    Host::tuple_arg(*self, x).await
+                }
+                async fn tuple_result(&mut self) -> (char, u32) {
+                    Host::tuple_result(*self).await
+                }
+                async fn empty_arg(&mut self, x: Empty) -> () {
+                    Host::empty_arg(*self, x).await
+                }
+                async fn empty_result(&mut self) -> Empty {
+                    Host::empty_result(*self).await
+                }
+                async fn scalar_arg(&mut self, x: Scalars) -> () {
+                    Host::scalar_arg(*self, x).await
+                }
+                async fn scalar_result(&mut self) -> Scalars {
+                    Host::scalar_result(*self).await
+                }
+                async fn flags_arg(&mut self, x: ReallyFlags) -> () {
+                    Host::flags_arg(*self, x).await
+                }
+                async fn flags_result(&mut self) -> ReallyFlags {
+                    Host::flags_result(*self).await
+                }
+                async fn aggregate_arg(&mut self, x: Aggregates) -> () {
+                    Host::aggregate_arg(*self, x).await
+                }
+                async fn aggregate_result(&mut self) -> Aggregates {
+                    Host::aggregate_result(*self).await
+                }
+                async fn typedef_inout(&mut self, e: TupleTypedef2) -> i32 {
+                    Host::typedef_inout(*self, e).await
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/rename.rs b/crates/component-macro/tests/expanded/rename.rs
index d571b8a2b7d..cb413829ecf 100644
--- a/crates/component-macro/tests/expanded/rename.rs
+++ b/crates/component-macro/tests/expanded/rename.rs
@@ -66,6 +66,25 @@ pub mod foo {
                 assert!(4 == < Thing as wasmtime::component::ComponentType >::ALIGN32);
             };
             pub trait Host {}
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
+                let mut inst = linker.instance("foo:foo/green")?;
+                Ok(())
+            }
             pub fn add_to_linker<T, U>(
                 linker: &mut wasmtime::component::Linker<T>,
                 get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
@@ -73,9 +92,9 @@ pub mod foo {
             where
                 U: Host,
             {
-                let mut inst = linker.instance("foo:foo/green")?;
-                Ok(())
+                add_to_linker_get_host(linker, get)
             }
+            impl<_T: Host + ?Sized> Host for &mut _T {}
         }
         #[allow(clippy::all)]
         pub mod red {
@@ -89,24 +108,47 @@ pub mod foo {
             pub trait Host {
                 fn foo(&mut self) -> Thing;
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/red")?;
                 inst.func_wrap(
                     "foo",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::foo(host);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn foo(&mut self) -> Thing {
+                    Host::foo(*self)
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/rename_async.rs b/crates/component-macro/tests/expanded/rename_async.rs
index 282d55ddc09..6263ce3455b 100644
--- a/crates/component-macro/tests/expanded/rename_async.rs
+++ b/crates/component-macro/tests/expanded/rename_async.rs
@@ -8,8 +8,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::green::Host + foo::foo::red::Host + Send,
             T: Send,
+            U: foo::foo::green::Host + foo::foo::red::Host + Send,
         {
             foo::foo::green::add_to_linker(linker, get)?;
             foo::foo::red::add_to_linker(linker, get)?;
@@ -67,18 +67,41 @@ pub mod foo {
                 assert!(4 == < Thing as wasmtime::component::ComponentType >::ALIGN32);
             };
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {}
-            pub fn add_to_linker<T, U>(
+            pub trait Host: Send {}
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/green")?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {}
         }
         #[allow(clippy::all)]
         pub mod red {
@@ -90,28 +113,55 @@ pub mod foo {
                 assert!(4 == < Thing as wasmtime::component::ComponentType >::ALIGN32);
             };
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn foo(&mut self) -> Thing;
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/red")?;
                 inst.func_wrap_async(
                     "foo",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::foo(host).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn foo(&mut self) -> Thing {
+                    Host::foo(*self).await
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/resources-export.rs b/crates/component-macro/tests/expanded/resources-export.rs
index 9e24f76cb8e..ff5946cee7b 100644
--- a/crates/component-macro/tests/expanded/resources-export.rs
+++ b/crates/component-macro/tests/expanded/resources-export.rs
@@ -130,27 +130,54 @@ pub mod foo {
                     rep: wasmtime::component::Resource<Y>,
                 ) -> wasmtime::Result<()>;
             }
+            impl<_T: HostY + ?Sized> HostY for &mut _T {
+                fn drop(
+                    &mut self,
+                    rep: wasmtime::component::Resource<Y>,
+                ) -> wasmtime::Result<()> {
+                    HostY::drop(*self, rep)
+                }
+            }
             pub trait Host: HostY {}
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/transitive-import")?;
                 inst.resource(
                     "y",
                     wasmtime::component::ResourceType::host::<Y>(),
                     move |mut store, rep| -> wasmtime::Result<()> {
                         HostY::drop(
-                            get(store.data_mut()),
+                            &mut host_getter(store.data_mut()),
                             wasmtime::component::Resource::new_own(rep),
                         )
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {}
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/resources-export_async.rs b/crates/component-macro/tests/expanded/resources-export_async.rs
index cb2c71b4be6..1c6756ae56e 100644
--- a/crates/component-macro/tests/expanded/resources-export_async.rs
+++ b/crates/component-macro/tests/expanded/resources-export_async.rs
@@ -13,8 +13,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::transitive_import::Host + Send,
             T: Send,
+            U: foo::foo::transitive_import::Host + Send,
         {
             foo::foo::transitive_import::add_to_linker(linker, get)?;
             Ok(())
@@ -133,14 +133,34 @@ pub mod foo {
                 ) -> wasmtime::Result<()>;
             }
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host: HostY {}
-            pub fn add_to_linker<T, U>(
+            impl<_T: HostY + ?Sized + Send> HostY for &mut _T {
+                fn drop(
+                    &mut self,
+                    rep: wasmtime::component::Resource<Y>,
+                ) -> wasmtime::Result<()> {
+                    HostY::drop(*self, rep)
+                }
+            }
+            #[wasmtime::component::__internal::async_trait]
+            pub trait Host: Send + HostY {}
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/transitive-import")?;
                 inst.resource(
@@ -148,13 +168,25 @@ pub mod foo {
                     wasmtime::component::ResourceType::host::<Y>(),
                     move |mut store, rep| -> wasmtime::Result<()> {
                         HostY::drop(
-                            get(store.data_mut()),
+                            &mut host_getter(store.data_mut()),
                             wasmtime::component::Resource::new_own(rep),
                         )
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {}
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/resources-import.rs b/crates/component-macro/tests/expanded/resources-import.rs
index 5388a8c006f..3b66536ff01 100644
--- a/crates/component-macro/tests/expanded/resources-import.rs
+++ b/crates/component-macro/tests/expanded/resources-import.rs
@@ -8,6 +8,23 @@ pub trait HostWorldResource {
         rep: wasmtime::component::Resource<WorldResource>,
     ) -> wasmtime::Result<()>;
 }
+impl<_T: HostWorldResource + ?Sized> HostWorldResource for &mut _T {
+    fn new(&mut self) -> wasmtime::component::Resource<WorldResource> {
+        HostWorldResource::new(*self)
+    }
+    fn foo(&mut self, self_: wasmtime::component::Resource<WorldResource>) -> () {
+        HostWorldResource::foo(*self, self_)
+    }
+    fn static_foo(&mut self) -> () {
+        HostWorldResource::static_foo(*self)
+    }
+    fn drop(
+        &mut self,
+        rep: wasmtime::component::Resource<WorldResource>,
+    ) -> wasmtime::Result<()> {
+        HostWorldResource::drop(*self, rep)
+    }
+}
 pub struct TheWorld {
     interface1: exports::foo::foo::uses_resource_transitively::Guest,
     some_world_func2: wasmtime::component::Func,
@@ -15,36 +32,31 @@ pub struct TheWorld {
 pub trait TheWorldImports: HostWorldResource {
     fn some_world_func(&mut self) -> wasmtime::component::Resource<WorldResource>;
 }
+pub trait TheWorldImportsGetHost<
+    T,
+>: Fn(T) -> <Self as TheWorldImportsGetHost<T>>::Host + Send + Sync + Copy + 'static {
+    type Host: TheWorldImports;
+}
+impl<F, T, O> TheWorldImportsGetHost<T> for F
+where
+    F: Fn(T) -> O + Send + Sync + Copy + 'static,
+    O: TheWorldImports,
+{
+    type Host = O;
+}
+impl<_T: TheWorldImports + ?Sized> TheWorldImports for &mut _T {
+    fn some_world_func(&mut self) -> wasmtime::component::Resource<WorldResource> {
+        TheWorldImports::some_world_func(*self)
+    }
+}
 const _: () = {
     #[allow(unused_imports)]
     use wasmtime::component::__internal::anyhow;
     impl TheWorld {
-        pub fn add_to_linker<T, U>(
-            linker: &mut wasmtime::component::Linker<T>,
-            get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-        ) -> wasmtime::Result<()>
-        where
-            U: foo::foo::resources::Host + foo::foo::long_use_chain1::Host
-                + foo::foo::long_use_chain2::Host + foo::foo::long_use_chain3::Host
-                + foo::foo::long_use_chain4::Host
-                + foo::foo::transitive_interface_with_resource::Host + TheWorldImports,
-        {
-            foo::foo::resources::add_to_linker(linker, get)?;
-            foo::foo::long_use_chain1::add_to_linker(linker, get)?;
-            foo::foo::long_use_chain2::add_to_linker(linker, get)?;
-            foo::foo::long_use_chain3::add_to_linker(linker, get)?;
-            foo::foo::long_use_chain4::add_to_linker(linker, get)?;
-            foo::foo::transitive_interface_with_resource::add_to_linker(linker, get)?;
-            Self::add_root_to_linker(linker, get)?;
-            Ok(())
-        }
-        pub fn add_root_to_linker<T, U>(
+        pub fn add_to_linker_imports_get_host<T>(
             linker: &mut wasmtime::component::Linker<T>,
-            get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-        ) -> wasmtime::Result<()>
-        where
-            U: TheWorldImports,
-        {
+            host_getter: impl for<'a> TheWorldImportsGetHost<&'a mut T>,
+        ) -> wasmtime::Result<()> {
             let mut linker = linker.root();
             linker
                 .resource(
@@ -52,7 +64,7 @@ const _: () = {
                     wasmtime::component::ResourceType::host::<WorldResource>(),
                     move |mut store, rep| -> wasmtime::Result<()> {
                         HostWorldResource::drop(
-                            get(store.data_mut()),
+                            &mut host_getter(store.data_mut()),
                             wasmtime::component::Resource::new_own(rep),
                         )
                     },
@@ -61,7 +73,7 @@ const _: () = {
                 .func_wrap(
                     "[constructor]world-resource",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = HostWorldResource::new(host);
                         Ok((r,))
                     },
@@ -73,7 +85,7 @@ const _: () = {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::Resource<WorldResource>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = HostWorldResource::foo(host, arg0);
                         Ok(r)
                     },
@@ -82,7 +94,7 @@ const _: () = {
                 .func_wrap(
                     "[static]world-resource.static-foo",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = HostWorldResource::static_foo(host);
                         Ok(r)
                     },
@@ -91,13 +103,32 @@ const _: () = {
                 .func_wrap(
                     "some-world-func",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = TheWorldImports::some_world_func(host);
                         Ok((r,))
                     },
                 )?;
             Ok(())
         }
+        pub fn add_to_linker<T, U>(
+            linker: &mut wasmtime::component::Linker<T>,
+            get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+        ) -> wasmtime::Result<()>
+        where
+            U: foo::foo::resources::Host + foo::foo::long_use_chain1::Host
+                + foo::foo::long_use_chain2::Host + foo::foo::long_use_chain3::Host
+                + foo::foo::long_use_chain4::Host
+                + foo::foo::transitive_interface_with_resource::Host + TheWorldImports,
+        {
+            Self::add_to_linker_imports_get_host(linker, get)?;
+            foo::foo::resources::add_to_linker(linker, get)?;
+            foo::foo::long_use_chain1::add_to_linker(linker, get)?;
+            foo::foo::long_use_chain2::add_to_linker(linker, get)?;
+            foo::foo::long_use_chain3::add_to_linker(linker, get)?;
+            foo::foo::long_use_chain4::add_to_linker(linker, get)?;
+            foo::foo::transitive_interface_with_resource::add_to_linker(linker, get)?;
+            Ok(())
+        }
         /// Instantiates the provided `module` using the specified
         /// parameters, wrapping up the result in a structure that
         /// translates between wasm and the host.
@@ -191,6 +222,26 @@ pub mod foo {
                     rep: wasmtime::component::Resource<Bar>,
                 ) -> wasmtime::Result<()>;
             }
+            impl<_T: HostBar + ?Sized> HostBar for &mut _T {
+                fn new(&mut self) -> wasmtime::component::Resource<Bar> {
+                    HostBar::new(*self)
+                }
+                fn static_a(&mut self) -> u32 {
+                    HostBar::static_a(*self)
+                }
+                fn method_a(
+                    &mut self,
+                    self_: wasmtime::component::Resource<Bar>,
+                ) -> u32 {
+                    HostBar::method_a(*self, self_)
+                }
+                fn drop(
+                    &mut self,
+                    rep: wasmtime::component::Resource<Bar>,
+                ) -> wasmtime::Result<()> {
+                    HostBar::drop(*self, rep)
+                }
+            }
             #[derive(wasmtime::component::ComponentType)]
             #[derive(wasmtime::component::Lift)]
             #[derive(wasmtime::component::Lower)]
@@ -306,20 +357,29 @@ pub mod foo {
                 fn record_result(&mut self) -> NestedOwn;
                 fn func_with_handle_typedef(&mut self, x: SomeHandle) -> ();
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/resources")?;
                 inst.resource(
                     "bar",
                     wasmtime::component::ResourceType::host::<Bar>(),
                     move |mut store, rep| -> wasmtime::Result<()> {
                         HostBar::drop(
-                            get(store.data_mut()),
+                            &mut host_getter(store.data_mut()),
                             wasmtime::component::Resource::new_own(rep),
                         )
                     },
@@ -327,7 +387,7 @@ pub mod foo {
                 inst.func_wrap(
                     "[constructor]bar",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = HostBar::new(host);
                         Ok((r,))
                     },
@@ -335,7 +395,7 @@ pub mod foo {
                 inst.func_wrap(
                     "[static]bar.static-a",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = HostBar::static_a(host);
                         Ok((r,))
                     },
@@ -346,7 +406,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::Resource<Bar>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = HostBar::method_a(host, arg0);
                         Ok((r,))
                     },
@@ -357,7 +417,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::Resource<Bar>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::bar_own_arg(host, arg0);
                         Ok(r)
                     },
@@ -368,7 +428,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::Resource<Bar>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::bar_borrow_arg(host, arg0);
                         Ok(r)
                     },
@@ -376,7 +436,7 @@ pub mod foo {
                 inst.func_wrap(
                     "bar-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::bar_result(host);
                         Ok((r,))
                     },
@@ -387,7 +447,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): ((wasmtime::component::Resource<Bar>, u32),)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::tuple_own_arg(host, arg0);
                         Ok(r)
                     },
@@ -398,7 +458,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): ((wasmtime::component::Resource<Bar>, u32),)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::tuple_borrow_arg(host, arg0);
                         Ok(r)
                     },
@@ -406,7 +466,7 @@ pub mod foo {
                 inst.func_wrap(
                     "tuple-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::tuple_result(host);
                         Ok((r,))
                     },
@@ -417,7 +477,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Option<wasmtime::component::Resource<Bar>>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::option_own_arg(host, arg0);
                         Ok(r)
                     },
@@ -428,7 +488,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Option<wasmtime::component::Resource<Bar>>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::option_borrow_arg(host, arg0);
                         Ok(r)
                     },
@@ -436,7 +496,7 @@ pub mod foo {
                 inst.func_wrap(
                     "option-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::option_result(host);
                         Ok((r,))
                     },
@@ -447,7 +507,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Result<wasmtime::component::Resource<Bar>, ()>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::result_own_arg(host, arg0);
                         Ok(r)
                     },
@@ -458,7 +518,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Result<wasmtime::component::Resource<Bar>, ()>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::result_borrow_arg(host, arg0);
                         Ok(r)
                     },
@@ -466,7 +526,7 @@ pub mod foo {
                 inst.func_wrap(
                     "result-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::result_result(host);
                         Ok((r,))
                     },
@@ -483,7 +543,7 @@ pub mod foo {
                             >,
                         )|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_own_arg(host, arg0);
                         Ok(r)
                     },
@@ -500,7 +560,7 @@ pub mod foo {
                             >,
                         )|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_borrow_arg(host, arg0);
                         Ok(r)
                     },
@@ -508,7 +568,7 @@ pub mod foo {
                 inst.func_wrap(
                     "list-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_result(host);
                         Ok((r,))
                     },
@@ -519,7 +579,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (NestedOwn,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::record_own_arg(host, arg0);
                         Ok(r)
                     },
@@ -530,7 +590,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (NestedBorrow,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::record_borrow_arg(host, arg0);
                         Ok(r)
                     },
@@ -538,7 +598,7 @@ pub mod foo {
                 inst.func_wrap(
                     "record-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::record_result(host);
                         Ok((r,))
                     },
@@ -549,13 +609,120 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (SomeHandle,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::func_with_handle_typedef(host, arg0);
                         Ok(r)
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn bar_own_arg(&mut self, x: wasmtime::component::Resource<Bar>) -> () {
+                    Host::bar_own_arg(*self, x)
+                }
+                fn bar_borrow_arg(
+                    &mut self,
+                    x: wasmtime::component::Resource<Bar>,
+                ) -> () {
+                    Host::bar_borrow_arg(*self, x)
+                }
+                fn bar_result(&mut self) -> wasmtime::component::Resource<Bar> {
+                    Host::bar_result(*self)
+                }
+                fn tuple_own_arg(
+                    &mut self,
+                    x: (wasmtime::component::Resource<Bar>, u32),
+                ) -> () {
+                    Host::tuple_own_arg(*self, x)
+                }
+                fn tuple_borrow_arg(
+                    &mut self,
+                    x: (wasmtime::component::Resource<Bar>, u32),
+                ) -> () {
+                    Host::tuple_borrow_arg(*self, x)
+                }
+                fn tuple_result(&mut self) -> (wasmtime::component::Resource<Bar>, u32) {
+                    Host::tuple_result(*self)
+                }
+                fn option_own_arg(
+                    &mut self,
+                    x: Option<wasmtime::component::Resource<Bar>>,
+                ) -> () {
+                    Host::option_own_arg(*self, x)
+                }
+                fn option_borrow_arg(
+                    &mut self,
+                    x: Option<wasmtime::component::Resource<Bar>>,
+                ) -> () {
+                    Host::option_borrow_arg(*self, x)
+                }
+                fn option_result(
+                    &mut self,
+                ) -> Option<wasmtime::component::Resource<Bar>> {
+                    Host::option_result(*self)
+                }
+                fn result_own_arg(
+                    &mut self,
+                    x: Result<wasmtime::component::Resource<Bar>, ()>,
+                ) -> () {
+                    Host::result_own_arg(*self, x)
+                }
+                fn result_borrow_arg(
+                    &mut self,
+                    x: Result<wasmtime::component::Resource<Bar>, ()>,
+                ) -> () {
+                    Host::result_borrow_arg(*self, x)
+                }
+                fn result_result(
+                    &mut self,
+                ) -> Result<wasmtime::component::Resource<Bar>, ()> {
+                    Host::result_result(*self)
+                }
+                fn list_own_arg(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<
+                        wasmtime::component::Resource<Bar>,
+                    >,
+                ) -> () {
+                    Host::list_own_arg(*self, x)
+                }
+                fn list_borrow_arg(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<
+                        wasmtime::component::Resource<Bar>,
+                    >,
+                ) -> () {
+                    Host::list_borrow_arg(*self, x)
+                }
+                fn list_result(
+                    &mut self,
+                ) -> wasmtime::component::__internal::Vec<
+                    wasmtime::component::Resource<Bar>,
+                > {
+                    Host::list_result(*self)
+                }
+                fn record_own_arg(&mut self, x: NestedOwn) -> () {
+                    Host::record_own_arg(*self, x)
+                }
+                fn record_borrow_arg(&mut self, x: NestedBorrow) -> () {
+                    Host::record_borrow_arg(*self, x)
+                }
+                fn record_result(&mut self) -> NestedOwn {
+                    Host::record_result(*self)
+                }
+                fn func_with_handle_typedef(&mut self, x: SomeHandle) -> () {
+                    Host::func_with_handle_typedef(*self, x)
+                }
+            }
         }
         #[allow(clippy::all)]
         pub mod long_use_chain1 {
@@ -568,27 +735,54 @@ pub mod foo {
                     rep: wasmtime::component::Resource<A>,
                 ) -> wasmtime::Result<()>;
             }
+            impl<_T: HostA + ?Sized> HostA for &mut _T {
+                fn drop(
+                    &mut self,
+                    rep: wasmtime::component::Resource<A>,
+                ) -> wasmtime::Result<()> {
+                    HostA::drop(*self, rep)
+                }
+            }
             pub trait Host: HostA {}
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/long-use-chain1")?;
                 inst.resource(
                     "a",
                     wasmtime::component::ResourceType::host::<A>(),
                     move |mut store, rep| -> wasmtime::Result<()> {
                         HostA::drop(
-                            get(store.data_mut()),
+                            &mut host_getter(store.data_mut()),
                             wasmtime::component::Resource::new_own(rep),
                         )
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {}
         }
         #[allow(clippy::all)]
         pub mod long_use_chain2 {
@@ -596,6 +790,25 @@ pub mod foo {
             use wasmtime::component::__internal::anyhow;
             pub type A = super::super::super::foo::foo::long_use_chain1::A;
             pub trait Host {}
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
+                let mut inst = linker.instance("foo:foo/long-use-chain2")?;
+                Ok(())
+            }
             pub fn add_to_linker<T, U>(
                 linker: &mut wasmtime::component::Linker<T>,
                 get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
@@ -603,9 +816,9 @@ pub mod foo {
             where
                 U: Host,
             {
-                let mut inst = linker.instance("foo:foo/long-use-chain2")?;
-                Ok(())
+                add_to_linker_get_host(linker, get)
             }
+            impl<_T: Host + ?Sized> Host for &mut _T {}
         }
         #[allow(clippy::all)]
         pub mod long_use_chain3 {
@@ -613,6 +826,25 @@ pub mod foo {
             use wasmtime::component::__internal::anyhow;
             pub type A = super::super::super::foo::foo::long_use_chain2::A;
             pub trait Host {}
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
+                let mut inst = linker.instance("foo:foo/long-use-chain3")?;
+                Ok(())
+            }
             pub fn add_to_linker<T, U>(
                 linker: &mut wasmtime::component::Linker<T>,
                 get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
@@ -620,9 +852,9 @@ pub mod foo {
             where
                 U: Host,
             {
-                let mut inst = linker.instance("foo:foo/long-use-chain3")?;
-                Ok(())
+                add_to_linker_get_host(linker, get)
             }
+            impl<_T: Host + ?Sized> Host for &mut _T {}
         }
         #[allow(clippy::all)]
         pub mod long_use_chain4 {
@@ -632,24 +864,47 @@ pub mod foo {
             pub trait Host {
                 fn foo(&mut self) -> wasmtime::component::Resource<A>;
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/long-use-chain4")?;
                 inst.func_wrap(
                     "foo",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::foo(host);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn foo(&mut self) -> wasmtime::component::Resource<A> {
+                    Host::foo(*self)
+                }
+            }
         }
         #[allow(clippy::all)]
         pub mod transitive_interface_with_resource {
@@ -662,14 +917,31 @@ pub mod foo {
                     rep: wasmtime::component::Resource<Foo>,
                 ) -> wasmtime::Result<()>;
             }
+            impl<_T: HostFoo + ?Sized> HostFoo for &mut _T {
+                fn drop(
+                    &mut self,
+                    rep: wasmtime::component::Resource<Foo>,
+                ) -> wasmtime::Result<()> {
+                    HostFoo::drop(*self, rep)
+                }
+            }
             pub trait Host: HostFoo {}
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker
                     .instance("foo:foo/transitive-interface-with-resource")?;
                 inst.resource(
@@ -677,13 +949,23 @@ pub mod foo {
                     wasmtime::component::ResourceType::host::<Foo>(),
                     move |mut store, rep| -> wasmtime::Result<()> {
                         HostFoo::drop(
-                            get(store.data_mut()),
+                            &mut host_getter(store.data_mut()),
                             wasmtime::component::Resource::new_own(rep),
                         )
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {}
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/resources-import_async.rs b/crates/component-macro/tests/expanded/resources-import_async.rs
index b783974ef74..9ee7049b51f 100644
--- a/crates/component-macro/tests/expanded/resources-import_async.rs
+++ b/crates/component-macro/tests/expanded/resources-import_async.rs
@@ -9,45 +9,59 @@ pub trait HostWorldResource {
         rep: wasmtime::component::Resource<WorldResource>,
     ) -> wasmtime::Result<()>;
 }
+#[wasmtime::component::__internal::async_trait]
+impl<_T: HostWorldResource + ?Sized + Send> HostWorldResource for &mut _T {
+    async fn new(&mut self) -> wasmtime::component::Resource<WorldResource> {
+        HostWorldResource::new(*self).await
+    }
+    async fn foo(&mut self, self_: wasmtime::component::Resource<WorldResource>) -> () {
+        HostWorldResource::foo(*self, self_).await
+    }
+    async fn static_foo(&mut self) -> () {
+        HostWorldResource::static_foo(*self).await
+    }
+    fn drop(
+        &mut self,
+        rep: wasmtime::component::Resource<WorldResource>,
+    ) -> wasmtime::Result<()> {
+        HostWorldResource::drop(*self, rep)
+    }
+}
 pub struct TheWorld {
     interface1: exports::foo::foo::uses_resource_transitively::Guest,
     some_world_func2: wasmtime::component::Func,
 }
 #[wasmtime::component::__internal::async_trait]
-pub trait TheWorldImports: HostWorldResource {
+pub trait TheWorldImports: Send + HostWorldResource {
     async fn some_world_func(&mut self) -> wasmtime::component::Resource<WorldResource>;
 }
+pub trait TheWorldImportsGetHost<
+    T,
+>: Fn(T) -> <Self as TheWorldImportsGetHost<T>>::Host + Send + Sync + Copy + 'static {
+    type Host: TheWorldImports;
+}
+impl<F, T, O> TheWorldImportsGetHost<T> for F
+where
+    F: Fn(T) -> O + Send + Sync + Copy + 'static,
+    O: TheWorldImports,
+{
+    type Host = O;
+}
+#[wasmtime::component::__internal::async_trait]
+impl<_T: TheWorldImports + ?Sized + Send> TheWorldImports for &mut _T {
+    async fn some_world_func(&mut self) -> wasmtime::component::Resource<WorldResource> {
+        TheWorldImports::some_world_func(*self).await
+    }
+}
 const _: () = {
     #[allow(unused_imports)]
     use wasmtime::component::__internal::anyhow;
     impl TheWorld {
-        pub fn add_to_linker<T, U>(
-            linker: &mut wasmtime::component::Linker<T>,
-            get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-        ) -> wasmtime::Result<()>
-        where
-            U: foo::foo::resources::Host + foo::foo::long_use_chain1::Host
-                + foo::foo::long_use_chain2::Host + foo::foo::long_use_chain3::Host
-                + foo::foo::long_use_chain4::Host
-                + foo::foo::transitive_interface_with_resource::Host + TheWorldImports
-                + Send,
-            T: Send,
-        {
-            foo::foo::resources::add_to_linker(linker, get)?;
-            foo::foo::long_use_chain1::add_to_linker(linker, get)?;
-            foo::foo::long_use_chain2::add_to_linker(linker, get)?;
-            foo::foo::long_use_chain3::add_to_linker(linker, get)?;
-            foo::foo::long_use_chain4::add_to_linker(linker, get)?;
-            foo::foo::transitive_interface_with_resource::add_to_linker(linker, get)?;
-            Self::add_root_to_linker(linker, get)?;
-            Ok(())
-        }
-        pub fn add_root_to_linker<T, U>(
+        pub fn add_to_linker_imports_get_host<T>(
             linker: &mut wasmtime::component::Linker<T>,
-            get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            host_getter: impl for<'a> TheWorldImportsGetHost<&'a mut T>,
         ) -> wasmtime::Result<()>
         where
-            U: TheWorldImports + Send,
             T: Send,
         {
             let mut linker = linker.root();
@@ -57,7 +71,7 @@ const _: () = {
                     wasmtime::component::ResourceType::host::<WorldResource>(),
                     move |mut store, rep| -> wasmtime::Result<()> {
                         HostWorldResource::drop(
-                            get(store.data_mut()),
+                            &mut host_getter(store.data_mut()),
                             wasmtime::component::Resource::new_own(rep),
                         )
                     },
@@ -66,7 +80,7 @@ const _: () = {
                 .func_wrap_async(
                     "[constructor]world-resource",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = HostWorldResource::new(host).await;
                         Ok((r,))
                     }),
@@ -78,7 +92,7 @@ const _: () = {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::Resource<WorldResource>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = HostWorldResource::foo(host, arg0).await;
                         Ok(r)
                     }),
@@ -87,7 +101,7 @@ const _: () = {
                 .func_wrap_async(
                     "[static]world-resource.static-foo",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = HostWorldResource::static_foo(host).await;
                         Ok(r)
                     }),
@@ -96,13 +110,34 @@ const _: () = {
                 .func_wrap_async(
                     "some-world-func",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = TheWorldImports::some_world_func(host).await;
                         Ok((r,))
                     }),
                 )?;
             Ok(())
         }
+        pub fn add_to_linker<T, U>(
+            linker: &mut wasmtime::component::Linker<T>,
+            get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+        ) -> wasmtime::Result<()>
+        where
+            T: Send,
+            U: foo::foo::resources::Host + foo::foo::long_use_chain1::Host
+                + foo::foo::long_use_chain2::Host + foo::foo::long_use_chain3::Host
+                + foo::foo::long_use_chain4::Host
+                + foo::foo::transitive_interface_with_resource::Host + TheWorldImports
+                + Send,
+        {
+            Self::add_to_linker_imports_get_host(linker, get)?;
+            foo::foo::resources::add_to_linker(linker, get)?;
+            foo::foo::long_use_chain1::add_to_linker(linker, get)?;
+            foo::foo::long_use_chain2::add_to_linker(linker, get)?;
+            foo::foo::long_use_chain3::add_to_linker(linker, get)?;
+            foo::foo::long_use_chain4::add_to_linker(linker, get)?;
+            foo::foo::transitive_interface_with_resource::add_to_linker(linker, get)?;
+            Ok(())
+        }
         /// Instantiates the provided `module` using the specified
         /// parameters, wrapping up the result in a structure that
         /// translates between wasm and the host.
@@ -203,6 +238,27 @@ pub mod foo {
                     rep: wasmtime::component::Resource<Bar>,
                 ) -> wasmtime::Result<()>;
             }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: HostBar + ?Sized + Send> HostBar for &mut _T {
+                async fn new(&mut self) -> wasmtime::component::Resource<Bar> {
+                    HostBar::new(*self).await
+                }
+                async fn static_a(&mut self) -> u32 {
+                    HostBar::static_a(*self).await
+                }
+                async fn method_a(
+                    &mut self,
+                    self_: wasmtime::component::Resource<Bar>,
+                ) -> u32 {
+                    HostBar::method_a(*self, self_).await
+                }
+                fn drop(
+                    &mut self,
+                    rep: wasmtime::component::Resource<Bar>,
+                ) -> wasmtime::Result<()> {
+                    HostBar::drop(*self, rep)
+                }
+            }
             #[derive(wasmtime::component::ComponentType)]
             #[derive(wasmtime::component::Lift)]
             #[derive(wasmtime::component::Lower)]
@@ -259,7 +315,7 @@ pub mod foo {
                 );
             };
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host: HostBar {
+            pub trait Host: Send + HostBar {
                 async fn bar_own_arg(
                     &mut self,
                     x: wasmtime::component::Resource<Bar>,
@@ -324,13 +380,24 @@ pub mod foo {
                 async fn record_result(&mut self) -> NestedOwn;
                 async fn func_with_handle_typedef(&mut self, x: SomeHandle) -> ();
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/resources")?;
                 inst.resource(
@@ -338,7 +405,7 @@ pub mod foo {
                     wasmtime::component::ResourceType::host::<Bar>(),
                     move |mut store, rep| -> wasmtime::Result<()> {
                         HostBar::drop(
-                            get(store.data_mut()),
+                            &mut host_getter(store.data_mut()),
                             wasmtime::component::Resource::new_own(rep),
                         )
                     },
@@ -346,7 +413,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "[constructor]bar",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = HostBar::new(host).await;
                         Ok((r,))
                     }),
@@ -354,7 +421,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "[static]bar.static-a",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = HostBar::static_a(host).await;
                         Ok((r,))
                     }),
@@ -365,7 +432,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::Resource<Bar>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = HostBar::method_a(host, arg0).await;
                         Ok((r,))
                     }),
@@ -376,7 +443,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::Resource<Bar>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::bar_own_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -387,7 +454,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::Resource<Bar>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::bar_borrow_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -395,7 +462,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "bar-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::bar_result(host).await;
                         Ok((r,))
                     }),
@@ -406,7 +473,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): ((wasmtime::component::Resource<Bar>, u32),)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::tuple_own_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -417,7 +484,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): ((wasmtime::component::Resource<Bar>, u32),)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::tuple_borrow_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -425,7 +492,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "tuple-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::tuple_result(host).await;
                         Ok((r,))
                     }),
@@ -436,7 +503,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Option<wasmtime::component::Resource<Bar>>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::option_own_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -447,7 +514,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Option<wasmtime::component::Resource<Bar>>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::option_borrow_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -455,7 +522,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "option-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::option_result(host).await;
                         Ok((r,))
                     }),
@@ -466,7 +533,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Result<wasmtime::component::Resource<Bar>, ()>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::result_own_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -477,7 +544,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (Result<wasmtime::component::Resource<Bar>, ()>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::result_borrow_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -485,7 +552,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "result-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::result_result(host).await;
                         Ok((r,))
                     }),
@@ -502,7 +569,7 @@ pub mod foo {
                             >,
                         )|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_own_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -519,7 +586,7 @@ pub mod foo {
                             >,
                         )|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_borrow_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -527,7 +594,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "list-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::list_result(host).await;
                         Ok((r,))
                     }),
@@ -538,7 +605,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (NestedOwn,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::record_own_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -549,7 +616,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (NestedBorrow,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::record_borrow_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -557,7 +624,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "record-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::record_result(host).await;
                         Ok((r,))
                     }),
@@ -568,13 +635,127 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (SomeHandle,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::func_with_handle_typedef(host, arg0).await;
                         Ok(r)
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn bar_own_arg(
+                    &mut self,
+                    x: wasmtime::component::Resource<Bar>,
+                ) -> () {
+                    Host::bar_own_arg(*self, x).await
+                }
+                async fn bar_borrow_arg(
+                    &mut self,
+                    x: wasmtime::component::Resource<Bar>,
+                ) -> () {
+                    Host::bar_borrow_arg(*self, x).await
+                }
+                async fn bar_result(&mut self) -> wasmtime::component::Resource<Bar> {
+                    Host::bar_result(*self).await
+                }
+                async fn tuple_own_arg(
+                    &mut self,
+                    x: (wasmtime::component::Resource<Bar>, u32),
+                ) -> () {
+                    Host::tuple_own_arg(*self, x).await
+                }
+                async fn tuple_borrow_arg(
+                    &mut self,
+                    x: (wasmtime::component::Resource<Bar>, u32),
+                ) -> () {
+                    Host::tuple_borrow_arg(*self, x).await
+                }
+                async fn tuple_result(
+                    &mut self,
+                ) -> (wasmtime::component::Resource<Bar>, u32) {
+                    Host::tuple_result(*self).await
+                }
+                async fn option_own_arg(
+                    &mut self,
+                    x: Option<wasmtime::component::Resource<Bar>>,
+                ) -> () {
+                    Host::option_own_arg(*self, x).await
+                }
+                async fn option_borrow_arg(
+                    &mut self,
+                    x: Option<wasmtime::component::Resource<Bar>>,
+                ) -> () {
+                    Host::option_borrow_arg(*self, x).await
+                }
+                async fn option_result(
+                    &mut self,
+                ) -> Option<wasmtime::component::Resource<Bar>> {
+                    Host::option_result(*self).await
+                }
+                async fn result_own_arg(
+                    &mut self,
+                    x: Result<wasmtime::component::Resource<Bar>, ()>,
+                ) -> () {
+                    Host::result_own_arg(*self, x).await
+                }
+                async fn result_borrow_arg(
+                    &mut self,
+                    x: Result<wasmtime::component::Resource<Bar>, ()>,
+                ) -> () {
+                    Host::result_borrow_arg(*self, x).await
+                }
+                async fn result_result(
+                    &mut self,
+                ) -> Result<wasmtime::component::Resource<Bar>, ()> {
+                    Host::result_result(*self).await
+                }
+                async fn list_own_arg(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<
+                        wasmtime::component::Resource<Bar>,
+                    >,
+                ) -> () {
+                    Host::list_own_arg(*self, x).await
+                }
+                async fn list_borrow_arg(
+                    &mut self,
+                    x: wasmtime::component::__internal::Vec<
+                        wasmtime::component::Resource<Bar>,
+                    >,
+                ) -> () {
+                    Host::list_borrow_arg(*self, x).await
+                }
+                async fn list_result(
+                    &mut self,
+                ) -> wasmtime::component::__internal::Vec<
+                    wasmtime::component::Resource<Bar>,
+                > {
+                    Host::list_result(*self).await
+                }
+                async fn record_own_arg(&mut self, x: NestedOwn) -> () {
+                    Host::record_own_arg(*self, x).await
+                }
+                async fn record_borrow_arg(&mut self, x: NestedBorrow) -> () {
+                    Host::record_borrow_arg(*self, x).await
+                }
+                async fn record_result(&mut self) -> NestedOwn {
+                    Host::record_result(*self).await
+                }
+                async fn func_with_handle_typedef(&mut self, x: SomeHandle) -> () {
+                    Host::func_with_handle_typedef(*self, x).await
+                }
+            }
         }
         #[allow(clippy::all)]
         pub mod long_use_chain1 {
@@ -589,14 +770,34 @@ pub mod foo {
                 ) -> wasmtime::Result<()>;
             }
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host: HostA {}
-            pub fn add_to_linker<T, U>(
+            impl<_T: HostA + ?Sized + Send> HostA for &mut _T {
+                fn drop(
+                    &mut self,
+                    rep: wasmtime::component::Resource<A>,
+                ) -> wasmtime::Result<()> {
+                    HostA::drop(*self, rep)
+                }
+            }
+            #[wasmtime::component::__internal::async_trait]
+            pub trait Host: Send + HostA {}
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/long-use-chain1")?;
                 inst.resource(
@@ -604,13 +805,25 @@ pub mod foo {
                     wasmtime::component::ResourceType::host::<A>(),
                     move |mut store, rep| -> wasmtime::Result<()> {
                         HostA::drop(
-                            get(store.data_mut()),
+                            &mut host_getter(store.data_mut()),
                             wasmtime::component::Resource::new_own(rep),
                         )
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {}
         }
         #[allow(clippy::all)]
         pub mod long_use_chain2 {
@@ -618,18 +831,41 @@ pub mod foo {
             use wasmtime::component::__internal::anyhow;
             pub type A = super::super::super::foo::foo::long_use_chain1::A;
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {}
-            pub fn add_to_linker<T, U>(
+            pub trait Host: Send {}
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/long-use-chain2")?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {}
         }
         #[allow(clippy::all)]
         pub mod long_use_chain3 {
@@ -637,18 +873,41 @@ pub mod foo {
             use wasmtime::component::__internal::anyhow;
             pub type A = super::super::super::foo::foo::long_use_chain2::A;
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {}
-            pub fn add_to_linker<T, U>(
+            pub trait Host: Send {}
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/long-use-chain3")?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {}
         }
         #[allow(clippy::all)]
         pub mod long_use_chain4 {
@@ -656,28 +915,55 @@ pub mod foo {
             use wasmtime::component::__internal::anyhow;
             pub type A = super::super::super::foo::foo::long_use_chain3::A;
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn foo(&mut self) -> wasmtime::component::Resource<A>;
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/long-use-chain4")?;
                 inst.func_wrap_async(
                     "foo",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::foo(host).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn foo(&mut self) -> wasmtime::component::Resource<A> {
+                    Host::foo(*self).await
+                }
+            }
         }
         #[allow(clippy::all)]
         pub mod transitive_interface_with_resource {
@@ -692,14 +978,34 @@ pub mod foo {
                 ) -> wasmtime::Result<()>;
             }
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host: HostFoo {}
-            pub fn add_to_linker<T, U>(
+            impl<_T: HostFoo + ?Sized + Send> HostFoo for &mut _T {
+                fn drop(
+                    &mut self,
+                    rep: wasmtime::component::Resource<Foo>,
+                ) -> wasmtime::Result<()> {
+                    HostFoo::drop(*self, rep)
+                }
+            }
+            #[wasmtime::component::__internal::async_trait]
+            pub trait Host: Send + HostFoo {}
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker
                     .instance("foo:foo/transitive-interface-with-resource")?;
@@ -708,13 +1014,25 @@ pub mod foo {
                     wasmtime::component::ResourceType::host::<Foo>(),
                     move |mut store, rep| -> wasmtime::Result<()> {
                         HostFoo::drop(
-                            get(store.data_mut()),
+                            &mut host_getter(store.data_mut()),
                             wasmtime::component::Resource::new_own(rep),
                         )
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {}
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/share-types.rs b/crates/component-macro/tests/expanded/share-types.rs
index b9b20e015d3..3d4a99ae116 100644
--- a/crates/component-macro/tests/expanded/share-types.rs
+++ b/crates/component-macro/tests/expanded/share-types.rs
@@ -111,6 +111,25 @@ pub mod foo {
                 );
             };
             pub trait Host {}
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
+                let mut inst = linker.instance("foo:foo/http-types")?;
+                Ok(())
+            }
             pub fn add_to_linker<T, U>(
                 linker: &mut wasmtime::component::Linker<T>,
                 get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
@@ -118,9 +137,9 @@ pub mod foo {
             where
                 U: Host,
             {
-                let mut inst = linker.instance("foo:foo/http-types")?;
-                Ok(())
+                add_to_linker_get_host(linker, get)
             }
+            impl<_T: Host + ?Sized> Host for &mut _T {}
         }
     }
 }
@@ -141,24 +160,47 @@ pub mod http_fetch {
     pub trait Host {
         fn fetch_request(&mut self, request: Request) -> Response;
     }
-    pub fn add_to_linker<T, U>(
-        linker: &mut wasmtime::component::Linker<T>,
-        get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-    ) -> wasmtime::Result<()>
+    pub trait GetHost<
+        T,
+    >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+        type Host: Host;
+    }
+    impl<F, T, O> GetHost<T> for F
     where
-        U: Host,
+        F: Fn(T) -> O + Send + Sync + Copy + 'static,
+        O: Host,
     {
+        type Host = O;
+    }
+    pub fn add_to_linker_get_host<T>(
+        linker: &mut wasmtime::component::Linker<T>,
+        host_getter: impl for<'a> GetHost<&'a mut T>,
+    ) -> wasmtime::Result<()> {
         let mut inst = linker.instance("http-fetch")?;
         inst.func_wrap(
             "fetch-request",
             move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (Request,)| {
-                let host = get(caller.data_mut());
+                let host = &mut host_getter(caller.data_mut());
                 let r = Host::fetch_request(host, arg0);
                 Ok((r,))
             },
         )?;
         Ok(())
     }
+    pub fn add_to_linker<T, U>(
+        linker: &mut wasmtime::component::Linker<T>,
+        get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+    ) -> wasmtime::Result<()>
+    where
+        U: Host,
+    {
+        add_to_linker_get_host(linker, get)
+    }
+    impl<_T: Host + ?Sized> Host for &mut _T {
+        fn fetch_request(&mut self, request: Request) -> Response {
+            Host::fetch_request(*self, request)
+        }
+    }
 }
 pub mod exports {
     #[allow(clippy::all)]
diff --git a/crates/component-macro/tests/expanded/share-types_async.rs b/crates/component-macro/tests/expanded/share-types_async.rs
index 2f7e12bcbb7..763701a5e20 100644
--- a/crates/component-macro/tests/expanded/share-types_async.rs
+++ b/crates/component-macro/tests/expanded/share-types_async.rs
@@ -10,8 +10,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::http_types::Host + http_fetch::Host + Send,
             T: Send,
+            U: foo::foo::http_types::Host + http_fetch::Host + Send,
         {
             foo::foo::http_types::add_to_linker(linker, get)?;
             http_fetch::add_to_linker(linker, get)?;
@@ -112,18 +112,41 @@ pub mod foo {
                 );
             };
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {}
-            pub fn add_to_linker<T, U>(
+            pub trait Host: Send {}
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/http-types")?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {}
         }
     }
 }
@@ -142,28 +165,55 @@ pub mod http_fetch {
         assert!(4 == < Response as wasmtime::component::ComponentType >::ALIGN32);
     };
     #[wasmtime::component::__internal::async_trait]
-    pub trait Host {
+    pub trait Host: Send {
         async fn fetch_request(&mut self, request: Request) -> Response;
     }
-    pub fn add_to_linker<T, U>(
+    pub trait GetHost<
+        T,
+    >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+        type Host: Host + Send;
+    }
+    impl<F, T, O> GetHost<T> for F
+    where
+        F: Fn(T) -> O + Send + Sync + Copy + 'static,
+        O: Host + Send,
+    {
+        type Host = O;
+    }
+    pub fn add_to_linker_get_host<T>(
         linker: &mut wasmtime::component::Linker<T>,
-        get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+        host_getter: impl for<'a> GetHost<&'a mut T>,
     ) -> wasmtime::Result<()>
     where
         T: Send,
-        U: Host + Send,
     {
         let mut inst = linker.instance("http-fetch")?;
         inst.func_wrap_async(
             "fetch-request",
             move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (Request,)| wasmtime::component::__internal::Box::new(async move {
-                let host = get(caller.data_mut());
+                let host = &mut host_getter(caller.data_mut());
                 let r = Host::fetch_request(host, arg0).await;
                 Ok((r,))
             }),
         )?;
         Ok(())
     }
+    pub fn add_to_linker<T, U>(
+        linker: &mut wasmtime::component::Linker<T>,
+        get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+    ) -> wasmtime::Result<()>
+    where
+        U: Host + Send,
+        T: Send,
+    {
+        add_to_linker_get_host(linker, get)
+    }
+    #[wasmtime::component::__internal::async_trait]
+    impl<_T: Host + ?Sized + Send> Host for &mut _T {
+        async fn fetch_request(&mut self, request: Request) -> Response {
+            Host::fetch_request(*self, request).await
+        }
+    }
 }
 pub mod exports {
     #[allow(clippy::all)]
diff --git a/crates/component-macro/tests/expanded/simple-functions.rs b/crates/component-macro/tests/expanded/simple-functions.rs
index 2c70a61c645..5b9ede05cc5 100644
--- a/crates/component-macro/tests/expanded/simple-functions.rs
+++ b/crates/component-macro/tests/expanded/simple-functions.rs
@@ -79,18 +79,27 @@ pub mod foo {
                 fn f5(&mut self) -> (u32, u32);
                 fn f6(&mut self, a: u32, b: u32, c: u32) -> (u32, u32, u32);
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/simple")?;
                 inst.func_wrap(
                     "f1",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::f1(host);
                         Ok(r)
                     },
@@ -98,7 +107,7 @@ pub mod foo {
                 inst.func_wrap(
                     "f2",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (u32,)| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::f2(host, arg0);
                         Ok(r)
                     },
@@ -109,7 +118,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0, arg1): (u32, u32)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::f3(host, arg0, arg1);
                         Ok(r)
                     },
@@ -117,7 +126,7 @@ pub mod foo {
                 inst.func_wrap(
                     "f4",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::f4(host);
                         Ok((r,))
                     },
@@ -125,7 +134,7 @@ pub mod foo {
                 inst.func_wrap(
                     "f5",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::f5(host);
                         Ok((r,))
                     },
@@ -136,13 +145,42 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0, arg1, arg2): (u32, u32, u32)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::f6(host, arg0, arg1, arg2);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn f1(&mut self) -> () {
+                    Host::f1(*self)
+                }
+                fn f2(&mut self, a: u32) -> () {
+                    Host::f2(*self, a)
+                }
+                fn f3(&mut self, a: u32, b: u32) -> () {
+                    Host::f3(*self, a, b)
+                }
+                fn f4(&mut self) -> u32 {
+                    Host::f4(*self)
+                }
+                fn f5(&mut self) -> (u32, u32) {
+                    Host::f5(*self)
+                }
+                fn f6(&mut self, a: u32, b: u32, c: u32) -> (u32, u32, u32) {
+                    Host::f6(*self, a, b, c)
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/simple-functions_async.rs b/crates/component-macro/tests/expanded/simple-functions_async.rs
index 9ee97d98eb0..9eb7fb16f66 100644
--- a/crates/component-macro/tests/expanded/simple-functions_async.rs
+++ b/crates/component-macro/tests/expanded/simple-functions_async.rs
@@ -10,8 +10,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::simple::Host + Send,
             T: Send,
+            U: foo::foo::simple::Host + Send,
         {
             foo::foo::simple::add_to_linker(linker, get)?;
             Ok(())
@@ -73,7 +73,7 @@ pub mod foo {
             #[allow(unused_imports)]
             use wasmtime::component::__internal::anyhow;
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn f1(&mut self) -> ();
                 async fn f2(&mut self, a: u32) -> ();
                 async fn f3(&mut self, a: u32, b: u32) -> ();
@@ -81,19 +81,30 @@ pub mod foo {
                 async fn f5(&mut self) -> (u32, u32);
                 async fn f6(&mut self, a: u32, b: u32, c: u32) -> (u32, u32, u32);
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/simple")?;
                 inst.func_wrap_async(
                     "f1",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::f1(host).await;
                         Ok(r)
                     }),
@@ -101,7 +112,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "f2",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (u32,)| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::f2(host, arg0).await;
                         Ok(r)
                     }),
@@ -112,7 +123,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0, arg1): (u32, u32)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::f3(host, arg0, arg1).await;
                         Ok(r)
                     }),
@@ -120,7 +131,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "f4",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::f4(host).await;
                         Ok((r,))
                     }),
@@ -128,7 +139,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "f5",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::f5(host).await;
                         Ok((r,))
                     }),
@@ -139,13 +150,44 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0, arg1, arg2): (u32, u32, u32)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::f6(host, arg0, arg1, arg2).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn f1(&mut self) -> () {
+                    Host::f1(*self).await
+                }
+                async fn f2(&mut self, a: u32) -> () {
+                    Host::f2(*self, a).await
+                }
+                async fn f3(&mut self, a: u32, b: u32) -> () {
+                    Host::f3(*self, a, b).await
+                }
+                async fn f4(&mut self) -> u32 {
+                    Host::f4(*self).await
+                }
+                async fn f5(&mut self) -> (u32, u32) {
+                    Host::f5(*self).await
+                }
+                async fn f6(&mut self, a: u32, b: u32, c: u32) -> (u32, u32, u32) {
+                    Host::f6(*self, a, b, c).await
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/simple-lists.rs b/crates/component-macro/tests/expanded/simple-lists.rs
index 0a6722245d3..36a6f06bc76 100644
--- a/crates/component-macro/tests/expanded/simple-lists.rs
+++ b/crates/component-macro/tests/expanded/simple-lists.rs
@@ -96,13 +96,22 @@ pub mod foo {
                     wasmtime::component::__internal::Vec<u32>,
                 >;
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/simple-lists")?;
                 inst.func_wrap(
                     "simple-list1",
@@ -110,7 +119,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<u32>,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::simple_list1(host, arg0);
                         Ok(r)
                     },
@@ -118,7 +127,7 @@ pub mod foo {
                 inst.func_wrap(
                     "simple-list2",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::simple_list2(host);
                         Ok((r,))
                     },
@@ -135,7 +144,7 @@ pub mod foo {
                             wasmtime::component::__internal::Vec<u32>,
                         )|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::simple_list3(host, arg0, arg1);
                         Ok((r,))
                     },
@@ -152,13 +161,53 @@ pub mod foo {
                             >,
                         )|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::simple_list4(host, arg0);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn simple_list1(
+                    &mut self,
+                    l: wasmtime::component::__internal::Vec<u32>,
+                ) -> () {
+                    Host::simple_list1(*self, l)
+                }
+                fn simple_list2(&mut self) -> wasmtime::component::__internal::Vec<u32> {
+                    Host::simple_list2(*self)
+                }
+                fn simple_list3(
+                    &mut self,
+                    a: wasmtime::component::__internal::Vec<u32>,
+                    b: wasmtime::component::__internal::Vec<u32>,
+                ) -> (
+                    wasmtime::component::__internal::Vec<u32>,
+                    wasmtime::component::__internal::Vec<u32>,
+                ) {
+                    Host::simple_list3(*self, a, b)
+                }
+                fn simple_list4(
+                    &mut self,
+                    l: wasmtime::component::__internal::Vec<
+                        wasmtime::component::__internal::Vec<u32>,
+                    >,
+                ) -> wasmtime::component::__internal::Vec<
+                    wasmtime::component::__internal::Vec<u32>,
+                > {
+                    Host::simple_list4(*self, l)
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/simple-lists_async.rs b/crates/component-macro/tests/expanded/simple-lists_async.rs
index e789631cbd6..da455ce7384 100644
--- a/crates/component-macro/tests/expanded/simple-lists_async.rs
+++ b/crates/component-macro/tests/expanded/simple-lists_async.rs
@@ -10,8 +10,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::simple_lists::Host + Send,
             T: Send,
+            U: foo::foo::simple_lists::Host + Send,
         {
             foo::foo::simple_lists::add_to_linker(linker, get)?;
             Ok(())
@@ -75,7 +75,7 @@ pub mod foo {
             #[allow(unused_imports)]
             use wasmtime::component::__internal::anyhow;
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn simple_list1(
                     &mut self,
                     l: wasmtime::component::__internal::Vec<u32>,
@@ -100,13 +100,24 @@ pub mod foo {
                     wasmtime::component::__internal::Vec<u32>,
                 >;
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/simple-lists")?;
                 inst.func_wrap_async(
@@ -115,7 +126,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::Vec<u32>,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::simple_list1(host, arg0).await;
                         Ok(r)
                     }),
@@ -123,7 +134,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "simple-list2",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::simple_list2(host).await;
                         Ok((r,))
                     }),
@@ -140,7 +151,7 @@ pub mod foo {
                             wasmtime::component::__internal::Vec<u32>,
                         )|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::simple_list3(host, arg0, arg1).await;
                         Ok((r,))
                     }),
@@ -157,13 +168,57 @@ pub mod foo {
                             >,
                         )|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::simple_list4(host, arg0).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn simple_list1(
+                    &mut self,
+                    l: wasmtime::component::__internal::Vec<u32>,
+                ) -> () {
+                    Host::simple_list1(*self, l).await
+                }
+                async fn simple_list2(
+                    &mut self,
+                ) -> wasmtime::component::__internal::Vec<u32> {
+                    Host::simple_list2(*self).await
+                }
+                async fn simple_list3(
+                    &mut self,
+                    a: wasmtime::component::__internal::Vec<u32>,
+                    b: wasmtime::component::__internal::Vec<u32>,
+                ) -> (
+                    wasmtime::component::__internal::Vec<u32>,
+                    wasmtime::component::__internal::Vec<u32>,
+                ) {
+                    Host::simple_list3(*self, a, b).await
+                }
+                async fn simple_list4(
+                    &mut self,
+                    l: wasmtime::component::__internal::Vec<
+                        wasmtime::component::__internal::Vec<u32>,
+                    >,
+                ) -> wasmtime::component::__internal::Vec<
+                    wasmtime::component::__internal::Vec<u32>,
+                > {
+                    Host::simple_list4(*self, l).await
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/simple-wasi.rs b/crates/component-macro/tests/expanded/simple-wasi.rs
index acbb1b27ca7..5efd628b4a5 100644
--- a/crates/component-macro/tests/expanded/simple-wasi.rs
+++ b/crates/component-macro/tests/expanded/simple-wasi.rs
@@ -124,18 +124,27 @@ pub mod foo {
                 fn create_directory_at(&mut self) -> Result<(), Errno>;
                 fn stat(&mut self) -> Result<DescriptorStat, Errno>;
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/wasi-filesystem")?;
                 inst.func_wrap(
                     "create-directory-at",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::create_directory_at(host);
                         Ok((r,))
                     },
@@ -143,19 +152,55 @@ pub mod foo {
                 inst.func_wrap(
                     "stat",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::stat(host);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn create_directory_at(&mut self) -> Result<(), Errno> {
+                    Host::create_directory_at(*self)
+                }
+                fn stat(&mut self) -> Result<DescriptorStat, Errno> {
+                    Host::stat(*self)
+                }
+            }
         }
         #[allow(clippy::all)]
         pub mod wall_clock {
             #[allow(unused_imports)]
             use wasmtime::component::__internal::anyhow;
             pub trait Host {}
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
+                let mut inst = linker.instance("foo:foo/wall-clock")?;
+                Ok(())
+            }
             pub fn add_to_linker<T, U>(
                 linker: &mut wasmtime::component::Linker<T>,
                 get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
@@ -163,9 +208,9 @@ pub mod foo {
             where
                 U: Host,
             {
-                let mut inst = linker.instance("foo:foo/wall-clock")?;
-                Ok(())
+                add_to_linker_get_host(linker, get)
             }
+            impl<_T: Host + ?Sized> Host for &mut _T {}
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/simple-wasi_async.rs b/crates/component-macro/tests/expanded/simple-wasi_async.rs
index f05bda417b8..3fdd72a0869 100644
--- a/crates/component-macro/tests/expanded/simple-wasi_async.rs
+++ b/crates/component-macro/tests/expanded/simple-wasi_async.rs
@@ -8,8 +8,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::wasi_filesystem::Host + foo::foo::wall_clock::Host + Send,
             T: Send,
+            U: foo::foo::wasi_filesystem::Host + foo::foo::wall_clock::Host + Send,
         {
             foo::foo::wasi_filesystem::add_to_linker(linker, get)?;
             foo::foo::wall_clock::add_to_linker(linker, get)?;
@@ -122,23 +122,34 @@ pub mod foo {
                 assert!(1 == < Errno as wasmtime::component::ComponentType >::ALIGN32);
             };
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn create_directory_at(&mut self) -> Result<(), Errno>;
                 async fn stat(&mut self) -> Result<DescriptorStat, Errno>;
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/wasi-filesystem")?;
                 inst.func_wrap_async(
                     "create-directory-at",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::create_directory_at(host).await;
                         Ok((r,))
                     }),
@@ -146,31 +157,73 @@ pub mod foo {
                 inst.func_wrap_async(
                     "stat",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::stat(host).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn create_directory_at(&mut self) -> Result<(), Errno> {
+                    Host::create_directory_at(*self).await
+                }
+                async fn stat(&mut self) -> Result<DescriptorStat, Errno> {
+                    Host::stat(*self).await
+                }
+            }
         }
         #[allow(clippy::all)]
         pub mod wall_clock {
             #[allow(unused_imports)]
             use wasmtime::component::__internal::anyhow;
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {}
-            pub fn add_to_linker<T, U>(
+            pub trait Host: Send {}
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/wall-clock")?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {}
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/small-anonymous.rs b/crates/component-macro/tests/expanded/small-anonymous.rs
index c87be98d5b0..beb51a5719d 100644
--- a/crates/component-macro/tests/expanded/small-anonymous.rs
+++ b/crates/component-macro/tests/expanded/small-anonymous.rs
@@ -120,24 +120,49 @@ pub mod foo {
                     &mut self,
                 ) -> Result<Option<wasmtime::component::__internal::String>, Error>;
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/anon")?;
                 inst.func_wrap(
                     "option-test",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::option_test(host);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn option_test(
+                    &mut self,
+                ) -> Result<Option<wasmtime::component::__internal::String>, Error> {
+                    Host::option_test(*self)
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/small-anonymous_async.rs b/crates/component-macro/tests/expanded/small-anonymous_async.rs
index fcc4e11592b..16876dd89b6 100644
--- a/crates/component-macro/tests/expanded/small-anonymous_async.rs
+++ b/crates/component-macro/tests/expanded/small-anonymous_async.rs
@@ -10,8 +10,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::anon::Host + Send,
             T: Send,
+            U: foo::foo::anon::Host + Send,
         {
             foo::foo::anon::add_to_linker(linker, get)?;
             Ok(())
@@ -117,30 +117,59 @@ pub mod foo {
                 assert!(1 == < Error as wasmtime::component::ComponentType >::ALIGN32);
             };
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn option_test(
                     &mut self,
                 ) -> Result<Option<wasmtime::component::__internal::String>, Error>;
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/anon")?;
                 inst.func_wrap_async(
                     "option-test",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::option_test(host).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn option_test(
+                    &mut self,
+                ) -> Result<Option<wasmtime::component::__internal::String>, Error> {
+                    Host::option_test(*self).await
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/smoke.rs b/crates/component-macro/tests/expanded/smoke.rs
index e2bf1e2426b..7ab446dfefe 100644
--- a/crates/component-macro/tests/expanded/smoke.rs
+++ b/crates/component-macro/tests/expanded/smoke.rs
@@ -60,22 +60,45 @@ pub mod imports {
     pub trait Host {
         fn y(&mut self) -> ();
     }
-    pub fn add_to_linker<T, U>(
-        linker: &mut wasmtime::component::Linker<T>,
-        get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-    ) -> wasmtime::Result<()>
+    pub trait GetHost<
+        T,
+    >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+        type Host: Host;
+    }
+    impl<F, T, O> GetHost<T> for F
     where
-        U: Host,
+        F: Fn(T) -> O + Send + Sync + Copy + 'static,
+        O: Host,
     {
+        type Host = O;
+    }
+    pub fn add_to_linker_get_host<T>(
+        linker: &mut wasmtime::component::Linker<T>,
+        host_getter: impl for<'a> GetHost<&'a mut T>,
+    ) -> wasmtime::Result<()> {
         let mut inst = linker.instance("imports")?;
         inst.func_wrap(
             "y",
             move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                let host = get(caller.data_mut());
+                let host = &mut host_getter(caller.data_mut());
                 let r = Host::y(host);
                 Ok(r)
             },
         )?;
         Ok(())
     }
+    pub fn add_to_linker<T, U>(
+        linker: &mut wasmtime::component::Linker<T>,
+        get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+    ) -> wasmtime::Result<()>
+    where
+        U: Host,
+    {
+        add_to_linker_get_host(linker, get)
+    }
+    impl<_T: Host + ?Sized> Host for &mut _T {
+        fn y(&mut self) -> () {
+            Host::y(*self)
+        }
+    }
 }
diff --git a/crates/component-macro/tests/expanded/smoke_async.rs b/crates/component-macro/tests/expanded/smoke_async.rs
index 7f4c67909fa..a84a78826ac 100644
--- a/crates/component-macro/tests/expanded/smoke_async.rs
+++ b/crates/component-macro/tests/expanded/smoke_async.rs
@@ -8,8 +8,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: imports::Host + Send,
             T: Send,
+            U: imports::Host + Send,
         {
             imports::add_to_linker(linker, get)?;
             Ok(())
@@ -59,26 +59,53 @@ pub mod imports {
     #[allow(unused_imports)]
     use wasmtime::component::__internal::anyhow;
     #[wasmtime::component::__internal::async_trait]
-    pub trait Host {
+    pub trait Host: Send {
         async fn y(&mut self) -> ();
     }
-    pub fn add_to_linker<T, U>(
+    pub trait GetHost<
+        T,
+    >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+        type Host: Host + Send;
+    }
+    impl<F, T, O> GetHost<T> for F
+    where
+        F: Fn(T) -> O + Send + Sync + Copy + 'static,
+        O: Host + Send,
+    {
+        type Host = O;
+    }
+    pub fn add_to_linker_get_host<T>(
         linker: &mut wasmtime::component::Linker<T>,
-        get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+        host_getter: impl for<'a> GetHost<&'a mut T>,
     ) -> wasmtime::Result<()>
     where
         T: Send,
-        U: Host + Send,
     {
         let mut inst = linker.instance("imports")?;
         inst.func_wrap_async(
             "y",
             move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                let host = get(caller.data_mut());
+                let host = &mut host_getter(caller.data_mut());
                 let r = Host::y(host).await;
                 Ok(r)
             }),
         )?;
         Ok(())
     }
+    pub fn add_to_linker<T, U>(
+        linker: &mut wasmtime::component::Linker<T>,
+        get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+    ) -> wasmtime::Result<()>
+    where
+        U: Host + Send,
+        T: Send,
+    {
+        add_to_linker_get_host(linker, get)
+    }
+    #[wasmtime::component::__internal::async_trait]
+    impl<_T: Host + ?Sized + Send> Host for &mut _T {
+        async fn y(&mut self) -> () {
+            Host::y(*self).await
+        }
+    }
 }
diff --git a/crates/component-macro/tests/expanded/strings.rs b/crates/component-macro/tests/expanded/strings.rs
index 282abdb1748..1f9630e7ef2 100644
--- a/crates/component-macro/tests/expanded/strings.rs
+++ b/crates/component-macro/tests/expanded/strings.rs
@@ -82,13 +82,22 @@ pub mod foo {
                     b: wasmtime::component::__internal::String,
                 ) -> wasmtime::component::__internal::String;
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/strings")?;
                 inst.func_wrap(
                     "a",
@@ -96,7 +105,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::String,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a(host, arg0);
                         Ok(r)
                     },
@@ -104,7 +113,7 @@ pub mod foo {
                 inst.func_wrap(
                     "b",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::b(host);
                         Ok((r,))
                     },
@@ -121,13 +130,37 @@ pub mod foo {
                             wasmtime::component::__internal::String,
                         )|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::c(host, arg0, arg1);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn a(&mut self, x: wasmtime::component::__internal::String) -> () {
+                    Host::a(*self, x)
+                }
+                fn b(&mut self) -> wasmtime::component::__internal::String {
+                    Host::b(*self)
+                }
+                fn c(
+                    &mut self,
+                    a: wasmtime::component::__internal::String,
+                    b: wasmtime::component::__internal::String,
+                ) -> wasmtime::component::__internal::String {
+                    Host::c(*self, a, b)
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/strings_async.rs b/crates/component-macro/tests/expanded/strings_async.rs
index 01439090bc4..1f98471bf8f 100644
--- a/crates/component-macro/tests/expanded/strings_async.rs
+++ b/crates/component-macro/tests/expanded/strings_async.rs
@@ -10,8 +10,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::strings::Host + Send,
             T: Send,
+            U: foo::foo::strings::Host + Send,
         {
             foo::foo::strings::add_to_linker(linker, get)?;
             Ok(())
@@ -75,7 +75,7 @@ pub mod foo {
             #[allow(unused_imports)]
             use wasmtime::component::__internal::anyhow;
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn a(&mut self, x: wasmtime::component::__internal::String) -> ();
                 async fn b(&mut self) -> wasmtime::component::__internal::String;
                 async fn c(
@@ -84,13 +84,24 @@ pub mod foo {
                     b: wasmtime::component::__internal::String,
                 ) -> wasmtime::component::__internal::String;
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/strings")?;
                 inst.func_wrap_async(
@@ -99,7 +110,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (wasmtime::component::__internal::String,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a(host, arg0).await;
                         Ok(r)
                     }),
@@ -107,7 +118,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "b",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::b(host).await;
                         Ok((r,))
                     }),
@@ -124,13 +135,39 @@ pub mod foo {
                             wasmtime::component::__internal::String,
                         )|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::c(host, arg0, arg1).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn a(&mut self, x: wasmtime::component::__internal::String) -> () {
+                    Host::a(*self, x).await
+                }
+                async fn b(&mut self) -> wasmtime::component::__internal::String {
+                    Host::b(*self).await
+                }
+                async fn c(
+                    &mut self,
+                    a: wasmtime::component::__internal::String,
+                    b: wasmtime::component::__internal::String,
+                ) -> wasmtime::component::__internal::String {
+                    Host::c(*self, a, b).await
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/unversioned-foo.rs b/crates/component-macro/tests/expanded/unversioned-foo.rs
index 0f21b3159b6..8e65727b505 100644
--- a/crates/component-macro/tests/expanded/unversioned-foo.rs
+++ b/crates/component-macro/tests/expanded/unversioned-foo.rs
@@ -90,24 +90,47 @@ pub mod foo {
             pub trait Host {
                 fn g(&mut self) -> Result<(), Error>;
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/a")?;
                 inst.func_wrap(
                     "g",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::g(host);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn g(&mut self) -> Result<(), Error> {
+                    Host::g(*self)
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/unversioned-foo_async.rs b/crates/component-macro/tests/expanded/unversioned-foo_async.rs
index 86b510d5f66..df7187f0ca8 100644
--- a/crates/component-macro/tests/expanded/unversioned-foo_async.rs
+++ b/crates/component-macro/tests/expanded/unversioned-foo_async.rs
@@ -8,8 +8,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::a::Host + Send,
             T: Send,
+            U: foo::foo::a::Host + Send,
         {
             foo::foo::a::add_to_linker(linker, get)?;
             Ok(())
@@ -89,28 +89,55 @@ pub mod foo {
                 assert!(4 == < Error as wasmtime::component::ComponentType >::ALIGN32);
             };
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn g(&mut self) -> Result<(), Error>;
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/a")?;
                 inst.func_wrap_async(
                     "g",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::g(host).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn g(&mut self) -> Result<(), Error> {
+                    Host::g(*self).await
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/use-paths.rs b/crates/component-macro/tests/expanded/use-paths.rs
index 132227277fe..ecfac25afa5 100644
--- a/crates/component-macro/tests/expanded/use-paths.rs
+++ b/crates/component-macro/tests/expanded/use-paths.rs
@@ -80,24 +80,47 @@ pub mod foo {
             pub trait Host {
                 fn a(&mut self) -> Foo;
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/a")?;
                 inst.func_wrap(
                     "a",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a(host);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn a(&mut self) -> Foo {
+                    Host::a(*self)
+                }
+            }
         }
         #[allow(clippy::all)]
         pub mod b {
@@ -111,24 +134,47 @@ pub mod foo {
             pub trait Host {
                 fn a(&mut self) -> Foo;
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/b")?;
                 inst.func_wrap(
                     "a",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a(host);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn a(&mut self) -> Foo {
+                    Host::a(*self)
+                }
+            }
         }
         #[allow(clippy::all)]
         pub mod c {
@@ -142,24 +188,47 @@ pub mod foo {
             pub trait Host {
                 fn a(&mut self) -> Foo;
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/c")?;
                 inst.func_wrap(
                     "a",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a(host);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn a(&mut self) -> Foo {
+                    Host::a(*self)
+                }
+            }
         }
     }
 }
@@ -175,22 +244,45 @@ pub mod d {
     pub trait Host {
         fn b(&mut self) -> Foo;
     }
-    pub fn add_to_linker<T, U>(
-        linker: &mut wasmtime::component::Linker<T>,
-        get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-    ) -> wasmtime::Result<()>
+    pub trait GetHost<
+        T,
+    >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+        type Host: Host;
+    }
+    impl<F, T, O> GetHost<T> for F
     where
-        U: Host,
+        F: Fn(T) -> O + Send + Sync + Copy + 'static,
+        O: Host,
     {
+        type Host = O;
+    }
+    pub fn add_to_linker_get_host<T>(
+        linker: &mut wasmtime::component::Linker<T>,
+        host_getter: impl for<'a> GetHost<&'a mut T>,
+    ) -> wasmtime::Result<()> {
         let mut inst = linker.instance("d")?;
         inst.func_wrap(
             "b",
             move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                let host = get(caller.data_mut());
+                let host = &mut host_getter(caller.data_mut());
                 let r = Host::b(host);
                 Ok((r,))
             },
         )?;
         Ok(())
     }
+    pub fn add_to_linker<T, U>(
+        linker: &mut wasmtime::component::Linker<T>,
+        get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+    ) -> wasmtime::Result<()>
+    where
+        U: Host,
+    {
+        add_to_linker_get_host(linker, get)
+    }
+    impl<_T: Host + ?Sized> Host for &mut _T {
+        fn b(&mut self) -> Foo {
+            Host::b(*self)
+        }
+    }
 }
diff --git a/crates/component-macro/tests/expanded/use-paths_async.rs b/crates/component-macro/tests/expanded/use-paths_async.rs
index eed98976633..c0b0644a63c 100644
--- a/crates/component-macro/tests/expanded/use-paths_async.rs
+++ b/crates/component-macro/tests/expanded/use-paths_async.rs
@@ -8,9 +8,9 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
+            T: Send,
             U: foo::foo::a::Host + foo::foo::b::Host + foo::foo::c::Host + d::Host
                 + Send,
-            T: Send,
         {
             foo::foo::a::add_to_linker(linker, get)?;
             foo::foo::b::add_to_linker(linker, get)?;
@@ -80,28 +80,55 @@ pub mod foo {
                 assert!(1 == < Foo as wasmtime::component::ComponentType >::ALIGN32);
             };
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn a(&mut self) -> Foo;
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/a")?;
                 inst.func_wrap_async(
                     "a",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a(host).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn a(&mut self) -> Foo {
+                    Host::a(*self).await
+                }
+            }
         }
         #[allow(clippy::all)]
         pub mod b {
@@ -113,28 +140,55 @@ pub mod foo {
                 assert!(1 == < Foo as wasmtime::component::ComponentType >::ALIGN32);
             };
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn a(&mut self) -> Foo;
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/b")?;
                 inst.func_wrap_async(
                     "a",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a(host).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn a(&mut self) -> Foo {
+                    Host::a(*self).await
+                }
+            }
         }
         #[allow(clippy::all)]
         pub mod c {
@@ -146,28 +200,55 @@ pub mod foo {
                 assert!(1 == < Foo as wasmtime::component::ComponentType >::ALIGN32);
             };
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn a(&mut self) -> Foo;
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/c")?;
                 inst.func_wrap_async(
                     "a",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::a(host).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn a(&mut self) -> Foo {
+                    Host::a(*self).await
+                }
+            }
         }
     }
 }
@@ -181,26 +262,53 @@ pub mod d {
         assert!(1 == < Foo as wasmtime::component::ComponentType >::ALIGN32);
     };
     #[wasmtime::component::__internal::async_trait]
-    pub trait Host {
+    pub trait Host: Send {
         async fn b(&mut self) -> Foo;
     }
-    pub fn add_to_linker<T, U>(
+    pub trait GetHost<
+        T,
+    >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+        type Host: Host + Send;
+    }
+    impl<F, T, O> GetHost<T> for F
+    where
+        F: Fn(T) -> O + Send + Sync + Copy + 'static,
+        O: Host + Send,
+    {
+        type Host = O;
+    }
+    pub fn add_to_linker_get_host<T>(
         linker: &mut wasmtime::component::Linker<T>,
-        get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+        host_getter: impl for<'a> GetHost<&'a mut T>,
     ) -> wasmtime::Result<()>
     where
         T: Send,
-        U: Host + Send,
     {
         let mut inst = linker.instance("d")?;
         inst.func_wrap_async(
             "b",
             move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                let host = get(caller.data_mut());
+                let host = &mut host_getter(caller.data_mut());
                 let r = Host::b(host).await;
                 Ok((r,))
             }),
         )?;
         Ok(())
     }
+    pub fn add_to_linker<T, U>(
+        linker: &mut wasmtime::component::Linker<T>,
+        get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+    ) -> wasmtime::Result<()>
+    where
+        U: Host + Send,
+        T: Send,
+    {
+        add_to_linker_get_host(linker, get)
+    }
+    #[wasmtime::component::__internal::async_trait]
+    impl<_T: Host + ?Sized + Send> Host for &mut _T {
+        async fn b(&mut self) -> Foo {
+            Host::b(*self).await
+        }
+    }
 }
diff --git a/crates/component-macro/tests/expanded/variants.rs b/crates/component-macro/tests/expanded/variants.rs
index e0f5584c06d..4ea37c488cd 100644
--- a/crates/component-macro/tests/expanded/variants.rs
+++ b/crates/component-macro/tests/expanded/variants.rs
@@ -415,18 +415,27 @@ pub mod foo {
                 fn return_named_option(&mut self) -> Option<u8>;
                 fn return_named_result(&mut self) -> Result<u8, MyErrno>;
             }
-            pub fn add_to_linker<T, U>(
-                linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-            ) -> wasmtime::Result<()>
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
             where
-                U: Host,
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
             {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
                 let mut inst = linker.instance("foo:foo/variants")?;
                 inst.func_wrap(
                     "e1-arg",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (E1,)| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::e1_arg(host, arg0);
                         Ok(r)
                     },
@@ -434,7 +443,7 @@ pub mod foo {
                 inst.func_wrap(
                     "e1-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::e1_result(host);
                         Ok((r,))
                     },
@@ -442,7 +451,7 @@ pub mod foo {
                 inst.func_wrap(
                     "v1-arg",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (V1,)| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::v1_arg(host, arg0);
                         Ok(r)
                     },
@@ -450,7 +459,7 @@ pub mod foo {
                 inst.func_wrap(
                     "v1-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::v1_result(host);
                         Ok((r,))
                     },
@@ -461,7 +470,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (bool,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::bool_arg(host, arg0);
                         Ok(r)
                     },
@@ -469,7 +478,7 @@ pub mod foo {
                 inst.func_wrap(
                     "bool-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::bool_result(host);
                         Ok((r,))
                     },
@@ -494,7 +503,7 @@ pub mod foo {
                             Option<Option<bool>>,
                         )|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::option_arg(
                             host,
                             arg0,
@@ -510,7 +519,7 @@ pub mod foo {
                 inst.func_wrap(
                     "option-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::option_result(host);
                         Ok((r,))
                     },
@@ -528,7 +537,7 @@ pub mod foo {
                             arg5,
                         ): (Casts1, Casts2, Casts3, Casts4, Casts5, Casts6)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::casts(host, arg0, arg1, arg2, arg3, arg4, arg5);
                         Ok((r,))
                     },
@@ -556,7 +565,7 @@ pub mod foo {
                             >,
                         )|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::result_arg(
                             host,
                             arg0,
@@ -572,7 +581,7 @@ pub mod foo {
                 inst.func_wrap(
                     "result-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::result_result(host);
                         Ok((r,))
                     },
@@ -580,7 +589,7 @@ pub mod foo {
                 inst.func_wrap(
                     "return-result-sugar",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::return_result_sugar(host);
                         Ok((r,))
                     },
@@ -588,7 +597,7 @@ pub mod foo {
                 inst.func_wrap(
                     "return-result-sugar2",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::return_result_sugar2(host);
                         Ok((r,))
                     },
@@ -596,7 +605,7 @@ pub mod foo {
                 inst.func_wrap(
                     "return-result-sugar3",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::return_result_sugar3(host);
                         Ok((r,))
                     },
@@ -604,7 +613,7 @@ pub mod foo {
                 inst.func_wrap(
                     "return-result-sugar4",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::return_result_sugar4(host);
                         Ok((r,))
                     },
@@ -612,7 +621,7 @@ pub mod foo {
                 inst.func_wrap(
                     "return-option-sugar",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::return_option_sugar(host);
                         Ok((r,))
                     },
@@ -620,7 +629,7 @@ pub mod foo {
                 inst.func_wrap(
                     "return-option-sugar2",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::return_option_sugar2(host);
                         Ok((r,))
                     },
@@ -628,7 +637,7 @@ pub mod foo {
                 inst.func_wrap(
                     "result-simple",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::result_simple(host);
                         Ok((r,))
                     },
@@ -639,7 +648,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (IsClone,)|
                     {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::is_clone_arg(host, arg0);
                         Ok(r)
                     },
@@ -647,7 +656,7 @@ pub mod foo {
                 inst.func_wrap(
                     "is-clone-return",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::is_clone_return(host);
                         Ok((r,))
                     },
@@ -655,7 +664,7 @@ pub mod foo {
                 inst.func_wrap(
                     "return-named-option",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::return_named_option(host);
                         Ok((r,))
                     },
@@ -663,13 +672,138 @@ pub mod foo {
                 inst.func_wrap(
                     "return-named-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::return_named_result(host);
                         Ok((r,))
                     },
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            impl<_T: Host + ?Sized> Host for &mut _T {
+                fn e1_arg(&mut self, x: E1) -> () {
+                    Host::e1_arg(*self, x)
+                }
+                fn e1_result(&mut self) -> E1 {
+                    Host::e1_result(*self)
+                }
+                fn v1_arg(&mut self, x: V1) -> () {
+                    Host::v1_arg(*self, x)
+                }
+                fn v1_result(&mut self) -> V1 {
+                    Host::v1_result(*self)
+                }
+                fn bool_arg(&mut self, x: bool) -> () {
+                    Host::bool_arg(*self, x)
+                }
+                fn bool_result(&mut self) -> bool {
+                    Host::bool_result(*self)
+                }
+                fn option_arg(
+                    &mut self,
+                    a: Option<bool>,
+                    b: Option<()>,
+                    c: Option<u32>,
+                    d: Option<E1>,
+                    e: Option<f32>,
+                    g: Option<Option<bool>>,
+                ) -> () {
+                    Host::option_arg(*self, a, b, c, d, e, g)
+                }
+                fn option_result(
+                    &mut self,
+                ) -> (
+                    Option<bool>,
+                    Option<()>,
+                    Option<u32>,
+                    Option<E1>,
+                    Option<f32>,
+                    Option<Option<bool>>,
+                ) {
+                    Host::option_result(*self)
+                }
+                fn casts(
+                    &mut self,
+                    a: Casts1,
+                    b: Casts2,
+                    c: Casts3,
+                    d: Casts4,
+                    e: Casts5,
+                    f: Casts6,
+                ) -> (Casts1, Casts2, Casts3, Casts4, Casts5, Casts6) {
+                    Host::casts(*self, a, b, c, d, e, f)
+                }
+                fn result_arg(
+                    &mut self,
+                    a: Result<(), ()>,
+                    b: Result<(), E1>,
+                    c: Result<E1, ()>,
+                    d: Result<(), ()>,
+                    e: Result<u32, V1>,
+                    f: Result<
+                        wasmtime::component::__internal::String,
+                        wasmtime::component::__internal::Vec<u8>,
+                    >,
+                ) -> () {
+                    Host::result_arg(*self, a, b, c, d, e, f)
+                }
+                fn result_result(
+                    &mut self,
+                ) -> (
+                    Result<(), ()>,
+                    Result<(), E1>,
+                    Result<E1, ()>,
+                    Result<(), ()>,
+                    Result<u32, V1>,
+                    Result<
+                        wasmtime::component::__internal::String,
+                        wasmtime::component::__internal::Vec<u8>,
+                    >,
+                ) {
+                    Host::result_result(*self)
+                }
+                fn return_result_sugar(&mut self) -> Result<i32, MyErrno> {
+                    Host::return_result_sugar(*self)
+                }
+                fn return_result_sugar2(&mut self) -> Result<(), MyErrno> {
+                    Host::return_result_sugar2(*self)
+                }
+                fn return_result_sugar3(&mut self) -> Result<MyErrno, MyErrno> {
+                    Host::return_result_sugar3(*self)
+                }
+                fn return_result_sugar4(&mut self) -> Result<(i32, u32), MyErrno> {
+                    Host::return_result_sugar4(*self)
+                }
+                fn return_option_sugar(&mut self) -> Option<i32> {
+                    Host::return_option_sugar(*self)
+                }
+                fn return_option_sugar2(&mut self) -> Option<MyErrno> {
+                    Host::return_option_sugar2(*self)
+                }
+                fn result_simple(&mut self) -> Result<u32, i32> {
+                    Host::result_simple(*self)
+                }
+                fn is_clone_arg(&mut self, a: IsClone) -> () {
+                    Host::is_clone_arg(*self, a)
+                }
+                fn is_clone_return(&mut self) -> IsClone {
+                    Host::is_clone_return(*self)
+                }
+                fn return_named_option(&mut self) -> Option<u8> {
+                    Host::return_named_option(*self)
+                }
+                fn return_named_result(&mut self) -> Result<u8, MyErrno> {
+                    Host::return_named_result(*self)
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/variants_async.rs b/crates/component-macro/tests/expanded/variants_async.rs
index 4a15ef135de..2863bf82540 100644
--- a/crates/component-macro/tests/expanded/variants_async.rs
+++ b/crates/component-macro/tests/expanded/variants_async.rs
@@ -10,8 +10,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::variants::Host + Send,
             T: Send,
+            U: foo::foo::variants::Host + Send,
         {
             foo::foo::variants::add_to_linker(linker, get)?;
             Ok(())
@@ -345,7 +345,7 @@ pub mod foo {
                 assert!(4 == < IsClone as wasmtime::component::ComponentType >::ALIGN32);
             };
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {
+            pub trait Host: Send {
                 async fn e1_arg(&mut self, x: E1) -> ();
                 async fn e1_result(&mut self) -> E1;
                 async fn v1_arg(&mut self, x: V1) -> ();
@@ -417,19 +417,30 @@ pub mod foo {
                 async fn return_named_option(&mut self) -> Option<u8>;
                 async fn return_named_result(&mut self) -> Result<u8, MyErrno>;
             }
-            pub fn add_to_linker<T, U>(
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/variants")?;
                 inst.func_wrap_async(
                     "e1-arg",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (E1,)| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::e1_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -437,7 +448,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "e1-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::e1_result(host).await;
                         Ok((r,))
                     }),
@@ -445,7 +456,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "v1-arg",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (arg0,): (V1,)| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::v1_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -453,7 +464,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "v1-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::v1_result(host).await;
                         Ok((r,))
                     }),
@@ -464,7 +475,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (bool,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::bool_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -472,7 +483,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "bool-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::bool_result(host).await;
                         Ok((r,))
                     }),
@@ -497,7 +508,7 @@ pub mod foo {
                             Option<Option<bool>>,
                         )|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::option_arg(
                                 host,
                                 arg0,
@@ -514,7 +525,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "option-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::option_result(host).await;
                         Ok((r,))
                     }),
@@ -532,7 +543,7 @@ pub mod foo {
                             arg5,
                         ): (Casts1, Casts2, Casts3, Casts4, Casts5, Casts6)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::casts(host, arg0, arg1, arg2, arg3, arg4, arg5)
                             .await;
                         Ok((r,))
@@ -561,7 +572,7 @@ pub mod foo {
                             >,
                         )|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::result_arg(
                                 host,
                                 arg0,
@@ -578,7 +589,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "result-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::result_result(host).await;
                         Ok((r,))
                     }),
@@ -586,7 +597,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "return-result-sugar",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::return_result_sugar(host).await;
                         Ok((r,))
                     }),
@@ -594,7 +605,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "return-result-sugar2",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::return_result_sugar2(host).await;
                         Ok((r,))
                     }),
@@ -602,7 +613,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "return-result-sugar3",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::return_result_sugar3(host).await;
                         Ok((r,))
                     }),
@@ -610,7 +621,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "return-result-sugar4",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::return_result_sugar4(host).await;
                         Ok((r,))
                     }),
@@ -618,7 +629,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "return-option-sugar",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::return_option_sugar(host).await;
                         Ok((r,))
                     }),
@@ -626,7 +637,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "return-option-sugar2",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::return_option_sugar2(host).await;
                         Ok((r,))
                     }),
@@ -634,7 +645,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "result-simple",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::result_simple(host).await;
                         Ok((r,))
                     }),
@@ -645,7 +656,7 @@ pub mod foo {
                         mut caller: wasmtime::StoreContextMut<'_, T>,
                         (arg0,): (IsClone,)|
                     wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::is_clone_arg(host, arg0).await;
                         Ok(r)
                     }),
@@ -653,7 +664,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "is-clone-return",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::is_clone_return(host).await;
                         Ok((r,))
                     }),
@@ -661,7 +672,7 @@ pub mod foo {
                 inst.func_wrap_async(
                     "return-named-option",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::return_named_option(host).await;
                         Ok((r,))
                     }),
@@ -669,13 +680,140 @@ pub mod foo {
                 inst.func_wrap_async(
                     "return-named-result",
                     move |mut caller: wasmtime::StoreContextMut<'_, T>, (): ()| wasmtime::component::__internal::Box::new(async move {
-                        let host = get(caller.data_mut());
+                        let host = &mut host_getter(caller.data_mut());
                         let r = Host::return_named_result(host).await;
                         Ok((r,))
                     }),
                 )?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {
+                async fn e1_arg(&mut self, x: E1) -> () {
+                    Host::e1_arg(*self, x).await
+                }
+                async fn e1_result(&mut self) -> E1 {
+                    Host::e1_result(*self).await
+                }
+                async fn v1_arg(&mut self, x: V1) -> () {
+                    Host::v1_arg(*self, x).await
+                }
+                async fn v1_result(&mut self) -> V1 {
+                    Host::v1_result(*self).await
+                }
+                async fn bool_arg(&mut self, x: bool) -> () {
+                    Host::bool_arg(*self, x).await
+                }
+                async fn bool_result(&mut self) -> bool {
+                    Host::bool_result(*self).await
+                }
+                async fn option_arg(
+                    &mut self,
+                    a: Option<bool>,
+                    b: Option<()>,
+                    c: Option<u32>,
+                    d: Option<E1>,
+                    e: Option<f32>,
+                    g: Option<Option<bool>>,
+                ) -> () {
+                    Host::option_arg(*self, a, b, c, d, e, g).await
+                }
+                async fn option_result(
+                    &mut self,
+                ) -> (
+                    Option<bool>,
+                    Option<()>,
+                    Option<u32>,
+                    Option<E1>,
+                    Option<f32>,
+                    Option<Option<bool>>,
+                ) {
+                    Host::option_result(*self).await
+                }
+                async fn casts(
+                    &mut self,
+                    a: Casts1,
+                    b: Casts2,
+                    c: Casts3,
+                    d: Casts4,
+                    e: Casts5,
+                    f: Casts6,
+                ) -> (Casts1, Casts2, Casts3, Casts4, Casts5, Casts6) {
+                    Host::casts(*self, a, b, c, d, e, f).await
+                }
+                async fn result_arg(
+                    &mut self,
+                    a: Result<(), ()>,
+                    b: Result<(), E1>,
+                    c: Result<E1, ()>,
+                    d: Result<(), ()>,
+                    e: Result<u32, V1>,
+                    f: Result<
+                        wasmtime::component::__internal::String,
+                        wasmtime::component::__internal::Vec<u8>,
+                    >,
+                ) -> () {
+                    Host::result_arg(*self, a, b, c, d, e, f).await
+                }
+                async fn result_result(
+                    &mut self,
+                ) -> (
+                    Result<(), ()>,
+                    Result<(), E1>,
+                    Result<E1, ()>,
+                    Result<(), ()>,
+                    Result<u32, V1>,
+                    Result<
+                        wasmtime::component::__internal::String,
+                        wasmtime::component::__internal::Vec<u8>,
+                    >,
+                ) {
+                    Host::result_result(*self).await
+                }
+                async fn return_result_sugar(&mut self) -> Result<i32, MyErrno> {
+                    Host::return_result_sugar(*self).await
+                }
+                async fn return_result_sugar2(&mut self) -> Result<(), MyErrno> {
+                    Host::return_result_sugar2(*self).await
+                }
+                async fn return_result_sugar3(&mut self) -> Result<MyErrno, MyErrno> {
+                    Host::return_result_sugar3(*self).await
+                }
+                async fn return_result_sugar4(&mut self) -> Result<(i32, u32), MyErrno> {
+                    Host::return_result_sugar4(*self).await
+                }
+                async fn return_option_sugar(&mut self) -> Option<i32> {
+                    Host::return_option_sugar(*self).await
+                }
+                async fn return_option_sugar2(&mut self) -> Option<MyErrno> {
+                    Host::return_option_sugar2(*self).await
+                }
+                async fn result_simple(&mut self) -> Result<u32, i32> {
+                    Host::result_simple(*self).await
+                }
+                async fn is_clone_arg(&mut self, a: IsClone) -> () {
+                    Host::is_clone_arg(*self, a).await
+                }
+                async fn is_clone_return(&mut self) -> IsClone {
+                    Host::is_clone_return(*self).await
+                }
+                async fn return_named_option(&mut self) -> Option<u8> {
+                    Host::return_named_option(*self).await
+                }
+                async fn return_named_result(&mut self) -> Result<u8, MyErrno> {
+                    Host::return_named_result(*self).await
+                }
+            }
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/worlds-with-types.rs b/crates/component-macro/tests/expanded/worlds-with-types.rs
index 3a900a5c447..420659266dd 100644
--- a/crates/component-macro/tests/expanded/worlds-with-types.rs
+++ b/crates/component-macro/tests/expanded/worlds-with-types.rs
@@ -104,6 +104,25 @@ pub mod foo {
                 assert!(2 == < T as wasmtime::component::ComponentType >::ALIGN32);
             };
             pub trait Host {}
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
+                linker: &mut wasmtime::component::Linker<T>,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
+            ) -> wasmtime::Result<()> {
+                let mut inst = linker.instance("foo:foo/i")?;
+                Ok(())
+            }
             pub fn add_to_linker<T, U>(
                 linker: &mut wasmtime::component::Linker<T>,
                 get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
@@ -111,9 +130,9 @@ pub mod foo {
             where
                 U: Host,
             {
-                let mut inst = linker.instance("foo:foo/i")?;
-                Ok(())
+                add_to_linker_get_host(linker, get)
             }
+            impl<_T: Host + ?Sized> Host for &mut _T {}
         }
     }
 }
diff --git a/crates/component-macro/tests/expanded/worlds-with-types_async.rs b/crates/component-macro/tests/expanded/worlds-with-types_async.rs
index 6a3245bbcdb..f93c15a1061 100644
--- a/crates/component-macro/tests/expanded/worlds-with-types_async.rs
+++ b/crates/component-macro/tests/expanded/worlds-with-types_async.rs
@@ -35,8 +35,8 @@ const _: () = {
             get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
         ) -> wasmtime::Result<()>
         where
-            U: foo::foo::i::Host + Send,
             T: Send,
+            U: foo::foo::i::Host + Send,
         {
             foo::foo::i::add_to_linker(linker, get)?;
             Ok(())
@@ -108,18 +108,41 @@ pub mod foo {
                 assert!(2 == < T as wasmtime::component::ComponentType >::ALIGN32);
             };
             #[wasmtime::component::__internal::async_trait]
-            pub trait Host {}
-            pub fn add_to_linker<T, U>(
+            pub trait Host: Send {}
+            pub trait GetHost<
+                T,
+            >: Fn(T) -> <Self as GetHost<T>>::Host + Send + Sync + Copy + 'static {
+                type Host: Host + Send;
+            }
+            impl<F, T, O> GetHost<T> for F
+            where
+                F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                O: Host + Send,
+            {
+                type Host = O;
+            }
+            pub fn add_to_linker_get_host<T>(
                 linker: &mut wasmtime::component::Linker<T>,
-                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                host_getter: impl for<'a> GetHost<&'a mut T>,
             ) -> wasmtime::Result<()>
             where
                 T: Send,
-                U: Host + Send,
             {
                 let mut inst = linker.instance("foo:foo/i")?;
                 Ok(())
             }
+            pub fn add_to_linker<T, U>(
+                linker: &mut wasmtime::component::Linker<T>,
+                get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+            ) -> wasmtime::Result<()>
+            where
+                U: Host + Send,
+                T: Send,
+            {
+                add_to_linker_get_host(linker, get)
+            }
+            #[wasmtime::component::__internal::async_trait]
+            impl<_T: Host + ?Sized + Send> Host for &mut _T {}
         }
     }
 }
diff --git a/crates/wasi-http/src/lib.rs b/crates/wasi-http/src/lib.rs
index cbccaa8836a..2d29d286fe6 100644
--- a/crates/wasi-http/src/lib.rs
+++ b/crates/wasi-http/src/lib.rs
@@ -27,7 +27,7 @@
 //! 2. Add WASI HTTP interfaces to a [`wasmtime::component::Linker<T>`]. This is either
 //!    done through functions like [`proxy::add_to_linker`] (which bundles all interfaces
 //!    in the `wasi:http/proxy` world together) or through individual interfaces like the
-//!    [`bindings::http::outgoing_handler::add_to_linker`] function.
+//!    [`bindings::http::outgoing_handler::add_to_linker_get_host`] function.
 //! 3. Use the previous [`wasmtime::component::Linker<T>::instantiate`] to instantiate
 //!    a [`wasmtime::component::Component`] within a [`wasmtime::Store<T>`]. If you're
 //!    targeting the `wasi:http/proxy` world, you can instantiate the component with
@@ -78,6 +78,7 @@ pub mod bindings {
         trappable_error_type: {
             "wasi:http/types/error-code" => crate::HttpError,
         },
+        skip_mut_forwarding_impls: true,
     });
 
     pub use wasi::http;
diff --git a/crates/wasi-http/src/proxy.rs b/crates/wasi-http/src/proxy.rs
index e904f3e4dba..e3889d544b1 100644
--- a/crates/wasi-http/src/proxy.rs
+++ b/crates/wasi-http/src/proxy.rs
@@ -83,26 +83,37 @@ pub fn add_to_linker<T>(l: &mut wasmtime::component::Linker<T>) -> anyhow::Resul
 where
     T: WasiHttpView + wasmtime_wasi::WasiView,
 {
-    wasmtime_wasi::bindings::clocks::wall_clock::add_to_linker(l, |t| t)?;
-    wasmtime_wasi::bindings::clocks::monotonic_clock::add_to_linker(l, |t| t)?;
-    wasmtime_wasi::bindings::io::poll::add_to_linker(l, |t| t)?;
-    wasmtime_wasi::bindings::io::error::add_to_linker(l, |t| t)?;
-    wasmtime_wasi::bindings::io::streams::add_to_linker(l, |t| t)?;
-    wasmtime_wasi::bindings::cli::stdin::add_to_linker(l, |t| t)?;
-    wasmtime_wasi::bindings::cli::stdout::add_to_linker(l, |t| t)?;
-    wasmtime_wasi::bindings::cli::stderr::add_to_linker(l, |t| t)?;
-    wasmtime_wasi::bindings::random::random::add_to_linker(l, |t| t)?;
+    let closure = type_annotate::<T, _>(|t| t);
+    wasmtime_wasi::bindings::clocks::wall_clock::add_to_linker_get_host(l, closure)?;
+    wasmtime_wasi::bindings::clocks::monotonic_clock::add_to_linker_get_host(l, closure)?;
+    wasmtime_wasi::bindings::io::poll::add_to_linker_get_host(l, closure)?;
+    wasmtime_wasi::bindings::io::error::add_to_linker_get_host(l, closure)?;
+    wasmtime_wasi::bindings::io::streams::add_to_linker_get_host(l, closure)?;
+    wasmtime_wasi::bindings::cli::stdin::add_to_linker_get_host(l, closure)?;
+    wasmtime_wasi::bindings::cli::stdout::add_to_linker_get_host(l, closure)?;
+    wasmtime_wasi::bindings::cli::stderr::add_to_linker_get_host(l, closure)?;
+    wasmtime_wasi::bindings::random::random::add_to_linker_get_host(l, closure)?;
 
     add_only_http_to_linker(l)
 }
 
+// NB: workaround some rustc inference - a future refactoring may make this
+// obsolete.
+fn type_annotate<T, F>(val: F) -> F
+where
+    F: Fn(&mut T) -> &mut T,
+{
+    val
+}
+
 #[doc(hidden)]
 pub fn add_only_http_to_linker<T>(l: &mut wasmtime::component::Linker<T>) -> anyhow::Result<()>
 where
     T: WasiHttpView + wasmtime_wasi::WasiView + crate::bindings::http::types::Host,
 {
-    crate::bindings::http::outgoing_handler::add_to_linker(l, |t| t)?;
-    crate::bindings::http::types::add_to_linker(l, |t| t)?;
+    let closure = type_annotate::<T, _>(|t| t);
+    crate::bindings::http::outgoing_handler::add_to_linker_get_host(l, closure)?;
+    crate::bindings::http::types::add_to_linker_get_host(l, closure)?;
 
     Ok(())
 }
@@ -185,15 +196,17 @@ pub mod sync {
     where
         T: WasiHttpView + wasmtime_wasi::WasiView,
     {
-        wasmtime_wasi::bindings::clocks::wall_clock::add_to_linker(l, |t| t)?;
-        wasmtime_wasi::bindings::clocks::monotonic_clock::add_to_linker(l, |t| t)?;
-        wasmtime_wasi::bindings::sync::io::poll::add_to_linker(l, |t| t)?;
-        wasmtime_wasi::bindings::sync::io::streams::add_to_linker(l, |t| t)?;
-        wasmtime_wasi::bindings::io::error::add_to_linker(l, |t| t)?;
-        wasmtime_wasi::bindings::cli::stdin::add_to_linker(l, |t| t)?;
-        wasmtime_wasi::bindings::cli::stdout::add_to_linker(l, |t| t)?;
-        wasmtime_wasi::bindings::cli::stderr::add_to_linker(l, |t| t)?;
-        wasmtime_wasi::bindings::random::random::add_to_linker(l, |t| t)?;
+        let closure = super::type_annotate::<T, _>(|t| t);
+
+        wasmtime_wasi::bindings::clocks::wall_clock::add_to_linker_get_host(l, closure)?;
+        wasmtime_wasi::bindings::clocks::monotonic_clock::add_to_linker_get_host(l, closure)?;
+        wasmtime_wasi::bindings::sync::io::poll::add_to_linker_get_host(l, closure)?;
+        wasmtime_wasi::bindings::sync::io::streams::add_to_linker_get_host(l, closure)?;
+        wasmtime_wasi::bindings::io::error::add_to_linker_get_host(l, closure)?;
+        wasmtime_wasi::bindings::cli::stdin::add_to_linker_get_host(l, closure)?;
+        wasmtime_wasi::bindings::cli::stdout::add_to_linker_get_host(l, closure)?;
+        wasmtime_wasi::bindings::cli::stderr::add_to_linker_get_host(l, closure)?;
+        wasmtime_wasi::bindings::random::random::add_to_linker_get_host(l, closure)?;
 
         add_only_http_to_linker(l)?;
 
@@ -206,8 +219,10 @@ pub mod sync {
     where
         T: WasiHttpView + wasmtime_wasi::WasiView + crate::bindings::http::types::Host,
     {
-        crate::bindings::http::outgoing_handler::add_to_linker(l, |t| t)?;
-        crate::bindings::http::types::add_to_linker(l, |t| t)?;
+        let closure = super::type_annotate::<T, _>(|t| t);
+
+        crate::bindings::http::outgoing_handler::add_to_linker_get_host(l, closure)?;
+        crate::bindings::http::types::add_to_linker_get_host(l, closure)?;
 
         Ok(())
     }
diff --git a/crates/wasi-http/src/types.rs b/crates/wasi-http/src/types.rs
index 28ab768630a..acc401d3083 100644
--- a/crates/wasi-http/src/types.rs
+++ b/crates/wasi-http/src/types.rs
@@ -30,7 +30,7 @@ impl WasiHttpCtx {
 }
 
 /// A trait which provides internal WASI HTTP state.
-pub trait WasiHttpView: Send {
+pub trait WasiHttpView {
     /// Returns a mutable reference to the WASI HTTP context.
     fn ctx(&mut self) -> &mut WasiHttpCtx;
 
@@ -71,10 +71,7 @@ pub trait WasiHttpView: Send {
         &mut self,
         request: hyper::Request<HyperOutgoingBody>,
         config: OutgoingRequestConfig,
-    ) -> crate::HttpResult<HostFutureIncomingResponse>
-    where
-        Self: Sized,
-    {
+    ) -> crate::HttpResult<HostFutureIncomingResponse> {
         Ok(default_send_request(request, config))
     }
 
@@ -84,6 +81,37 @@ pub trait WasiHttpView: Send {
     }
 }
 
+impl<T: ?Sized + WasiHttpView> WasiHttpView for &mut T {
+    fn ctx(&mut self) -> &mut WasiHttpCtx {
+        T::ctx(self)
+    }
+
+    fn table(&mut self) -> &mut ResourceTable {
+        T::table(self)
+    }
+
+    fn new_response_outparam(
+        &mut self,
+        result: tokio::sync::oneshot::Sender<
+            Result<hyper::Response<HyperOutgoingBody>, types::ErrorCode>,
+        >,
+    ) -> wasmtime::Result<Resource<HostResponseOutparam>> {
+        T::new_response_outparam(self, result)
+    }
+
+    fn send_request(
+        &mut self,
+        request: hyper::Request<HyperOutgoingBody>,
+        config: OutgoingRequestConfig,
+    ) -> crate::HttpResult<HostFutureIncomingResponse> {
+        T::send_request(self, request, config)
+    }
+
+    fn is_forbidden_header(&mut self, name: &HeaderName) -> bool {
+        T::is_forbidden_header(self, name)
+    }
+}
+
 /// Returns `true` when the header is forbidden according to this [`WasiHttpView`] implementation.
 pub(crate) fn is_forbidden_header(view: &mut dyn WasiHttpView, name: &HeaderName) -> bool {
     static FORBIDDEN_HEADERS: [HeaderName; 10] = [
diff --git a/crates/wasi-nn/Cargo.toml b/crates/wasi-nn/Cargo.toml
index d12f3af2a3f..1b8dc95d99d 100644
--- a/crates/wasi-nn/Cargo.toml
+++ b/crates/wasi-nn/Cargo.toml
@@ -16,7 +16,7 @@ workspace = true
 
 [dependencies]
 # These dependencies are necessary for the WITX-generation macros to work:
-anyhow = { workspace = true }
+anyhow = { workspace = true, features = ['std'] }
 wiggle = { workspace = true, features = ["wasmtime"] }
 
 # This dependency is necessary for the WIT-generation macros to work:
diff --git a/crates/wasi/src/bindings.rs b/crates/wasi/src/bindings.rs
index 737301403a9..8bc4add33ab 100644
--- a/crates/wasi/src/bindings.rs
+++ b/crates/wasi/src/bindings.rs
@@ -33,7 +33,8 @@ pub mod sync {
                 "wasi:io/poll/pollable": super::super::io::poll::Pollable,
                 "wasi:io/streams/input-stream": super::super::io::streams::InputStream,
                 "wasi:io/streams/output-stream": super::super::io::streams::OutputStream,
-            }
+            },
+            skip_mut_forwarding_impls: true,
         });
     }
     pub use self::generated::exports;
@@ -49,10 +50,6 @@ pub mod sync {
     /// component through the [`Command::wasi_cli_run`] method plus
     /// [`Guest::call_run`](exports::wasi::cli::run::Guest::call_run).
     ///
-    /// > **Note**: it's recommended to use
-    /// > [`wasmtime_wasi::add_to_linker_sync`] instead of the auto-generated
-    /// > [`Command::add_to_linker`] here.
-    ///
     /// [async]: wasmtime::Config::async_support
     /// [`wasmtime_wasi::add_to_linker_sync`]: crate::add_to_linker_sync
     ///
@@ -202,6 +199,7 @@ mod async_io {
             "wasi:cli/terminal-input/terminal-input": crate::stdio::TerminalInput,
             "wasi:cli/terminal-output/terminal-output": crate::stdio::TerminalOutput,
         },
+        skip_mut_forwarding_impls: true,
     });
 }
 
@@ -218,9 +216,6 @@ pub use self::async_io::wasi::*;
 /// through the [`Command::wasi_cli_run`] method plus
 /// [`Guest::call_run`](exports::wasi::cli::run::Guest::call_run).
 ///
-/// > **Note**: it's recommended to use [`wasmtime_wasi::add_to_linker_async`]
-/// > instead of the auto-generated [`Command::add_to_linker`] here.
-///
 /// [async]: wasmtime::Config::async_support
 /// [`wasmtime_wasi::add_to_linker_async`]: crate::add_to_linker_async
 ///
diff --git a/crates/wasi/src/ctx.rs b/crates/wasi/src/ctx.rs
index 8959bc8bbfa..62c323503f0 100644
--- a/crates/wasi/src/ctx.rs
+++ b/crates/wasi/src/ctx.rs
@@ -581,6 +581,15 @@ pub trait WasiView: Send {
     fn ctx(&mut self) -> &mut WasiCtx;
 }
 
+impl<T: ?Sized + WasiView> WasiView for &mut T {
+    fn table(&mut self) -> &mut ResourceTable {
+        T::table(self)
+    }
+    fn ctx(&mut self) -> &mut WasiCtx {
+        T::ctx(self)
+    }
+}
+
 /// Per-[`Store`] state which holds state necessary to implement WASI from this
 /// crate.
 ///
diff --git a/crates/wasi/src/lib.rs b/crates/wasi/src/lib.rs
index 0bc65d724c3..575f0e0d85d 100644
--- a/crates/wasi/src/lib.rs
+++ b/crates/wasi/src/lib.rs
@@ -285,33 +285,44 @@ pub use wasmtime::component::{ResourceTable, ResourceTableError};
 /// ```
 pub fn add_to_linker_async<T: WasiView>(linker: &mut Linker<T>) -> anyhow::Result<()> {
     let l = linker;
-    crate::bindings::clocks::wall_clock::add_to_linker(l, |t| t)?;
-    crate::bindings::clocks::monotonic_clock::add_to_linker(l, |t| t)?;
-    crate::bindings::filesystem::types::add_to_linker(l, |t| t)?;
-    crate::bindings::filesystem::preopens::add_to_linker(l, |t| t)?;
-    crate::bindings::io::error::add_to_linker(l, |t| t)?;
-    crate::bindings::io::poll::add_to_linker(l, |t| t)?;
-    crate::bindings::io::streams::add_to_linker(l, |t| t)?;
-    crate::bindings::random::random::add_to_linker(l, |t| t)?;
-    crate::bindings::random::insecure::add_to_linker(l, |t| t)?;
-    crate::bindings::random::insecure_seed::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::exit::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::environment::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::stdin::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::stdout::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::stderr::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::terminal_input::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::terminal_output::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::terminal_stdin::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::terminal_stdout::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::terminal_stderr::add_to_linker(l, |t| t)?;
-    crate::bindings::sockets::tcp::add_to_linker(l, |t| t)?;
-    crate::bindings::sockets::tcp_create_socket::add_to_linker(l, |t| t)?;
-    crate::bindings::sockets::udp::add_to_linker(l, |t| t)?;
-    crate::bindings::sockets::udp_create_socket::add_to_linker(l, |t| t)?;
-    crate::bindings::sockets::instance_network::add_to_linker(l, |t| t)?;
-    crate::bindings::sockets::network::add_to_linker(l, |t| t)?;
-    crate::bindings::sockets::ip_name_lookup::add_to_linker(l, |t| t)?;
+
+    // NB: workaround some rustc inference - a future refactoring may make this
+    // obsolete.
+    fn type_annotate<T, F>(val: F) -> F
+    where
+        F: Fn(&mut T) -> &mut T,
+    {
+        val
+    }
+    let closure = type_annotate::<T, _>(|t| t);
+
+    crate::bindings::clocks::wall_clock::add_to_linker_get_host(l, closure)?;
+    crate::bindings::clocks::monotonic_clock::add_to_linker_get_host(l, closure)?;
+    crate::bindings::filesystem::types::add_to_linker_get_host(l, closure)?;
+    crate::bindings::filesystem::preopens::add_to_linker_get_host(l, closure)?;
+    crate::bindings::io::error::add_to_linker_get_host(l, closure)?;
+    crate::bindings::io::poll::add_to_linker_get_host(l, closure)?;
+    crate::bindings::io::streams::add_to_linker_get_host(l, closure)?;
+    crate::bindings::random::random::add_to_linker_get_host(l, closure)?;
+    crate::bindings::random::insecure::add_to_linker_get_host(l, closure)?;
+    crate::bindings::random::insecure_seed::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::exit::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::environment::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::stdin::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::stdout::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::stderr::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::terminal_input::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::terminal_output::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::terminal_stdin::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::terminal_stdout::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::terminal_stderr::add_to_linker_get_host(l, closure)?;
+    crate::bindings::sockets::tcp::add_to_linker_get_host(l, closure)?;
+    crate::bindings::sockets::tcp_create_socket::add_to_linker_get_host(l, closure)?;
+    crate::bindings::sockets::udp::add_to_linker_get_host(l, closure)?;
+    crate::bindings::sockets::udp_create_socket::add_to_linker_get_host(l, closure)?;
+    crate::bindings::sockets::instance_network::add_to_linker_get_host(l, closure)?;
+    crate::bindings::sockets::network::add_to_linker_get_host(l, closure)?;
+    crate::bindings::sockets::ip_name_lookup::add_to_linker_get_host(l, closure)?;
     Ok(())
 }
 
@@ -373,32 +384,43 @@ pub fn add_to_linker_sync<T: WasiView>(
     linker: &mut wasmtime::component::Linker<T>,
 ) -> anyhow::Result<()> {
     let l = linker;
-    crate::bindings::clocks::wall_clock::add_to_linker(l, |t| t)?;
-    crate::bindings::clocks::monotonic_clock::add_to_linker(l, |t| t)?;
-    crate::bindings::sync::filesystem::types::add_to_linker(l, |t| t)?;
-    crate::bindings::filesystem::preopens::add_to_linker(l, |t| t)?;
-    crate::bindings::io::error::add_to_linker(l, |t| t)?;
-    crate::bindings::sync::io::poll::add_to_linker(l, |t| t)?;
-    crate::bindings::sync::io::streams::add_to_linker(l, |t| t)?;
-    crate::bindings::random::random::add_to_linker(l, |t| t)?;
-    crate::bindings::random::insecure::add_to_linker(l, |t| t)?;
-    crate::bindings::random::insecure_seed::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::exit::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::environment::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::stdin::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::stdout::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::stderr::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::terminal_input::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::terminal_output::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::terminal_stdin::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::terminal_stdout::add_to_linker(l, |t| t)?;
-    crate::bindings::cli::terminal_stderr::add_to_linker(l, |t| t)?;
-    crate::bindings::sockets::tcp::add_to_linker(l, |t| t)?;
-    crate::bindings::sockets::tcp_create_socket::add_to_linker(l, |t| t)?;
-    crate::bindings::sockets::udp::add_to_linker(l, |t| t)?;
-    crate::bindings::sockets::udp_create_socket::add_to_linker(l, |t| t)?;
-    crate::bindings::sockets::instance_network::add_to_linker(l, |t| t)?;
-    crate::bindings::sockets::network::add_to_linker(l, |t| t)?;
-    crate::bindings::sockets::ip_name_lookup::add_to_linker(l, |t| t)?;
+
+    // NB: workaround some rustc inference - a future refactoring may make this
+    // obsolete.
+    fn type_annotate<T, F>(val: F) -> F
+    where
+        F: Fn(&mut T) -> &mut T,
+    {
+        val
+    }
+    let closure = type_annotate::<T, _>(|t| t);
+
+    crate::bindings::clocks::wall_clock::add_to_linker_get_host(l, closure)?;
+    crate::bindings::clocks::monotonic_clock::add_to_linker_get_host(l, closure)?;
+    crate::bindings::sync::filesystem::types::add_to_linker_get_host(l, closure)?;
+    crate::bindings::filesystem::preopens::add_to_linker_get_host(l, closure)?;
+    crate::bindings::io::error::add_to_linker_get_host(l, closure)?;
+    crate::bindings::sync::io::poll::add_to_linker_get_host(l, closure)?;
+    crate::bindings::sync::io::streams::add_to_linker_get_host(l, closure)?;
+    crate::bindings::random::random::add_to_linker_get_host(l, closure)?;
+    crate::bindings::random::insecure::add_to_linker_get_host(l, closure)?;
+    crate::bindings::random::insecure_seed::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::exit::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::environment::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::stdin::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::stdout::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::stderr::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::terminal_input::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::terminal_output::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::terminal_stdin::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::terminal_stdout::add_to_linker_get_host(l, closure)?;
+    crate::bindings::cli::terminal_stderr::add_to_linker_get_host(l, closure)?;
+    crate::bindings::sockets::tcp::add_to_linker_get_host(l, closure)?;
+    crate::bindings::sockets::tcp_create_socket::add_to_linker_get_host(l, closure)?;
+    crate::bindings::sockets::udp::add_to_linker_get_host(l, closure)?;
+    crate::bindings::sockets::udp_create_socket::add_to_linker_get_host(l, closure)?;
+    crate::bindings::sockets::instance_network::add_to_linker_get_host(l, closure)?;
+    crate::bindings::sockets::network::add_to_linker_get_host(l, closure)?;
+    crate::bindings::sockets::ip_name_lookup::add_to_linker_get_host(l, closure)?;
     Ok(())
 }
diff --git a/crates/wit-bindgen/src/lib.rs b/crates/wit-bindgen/src/lib.rs
index a2c0c5fbde6..82eb8f8b95b 100644
--- a/crates/wit-bindgen/src/lib.rs
+++ b/crates/wit-bindgen/src/lib.rs
@@ -56,8 +56,9 @@ struct Wasmtime {
 }
 
 struct ImportFunction {
+    func: Function,
     add_to_linker: String,
-    sig: String,
+    sig: Option<String>,
 }
 
 #[derive(Default)]
@@ -123,6 +124,11 @@ pub struct Opts {
     /// Evaluate to a string literal containing the generated code rather than the generated tokens
     /// themselves. Mostly useful for Wasmtime internal debugging and development.
     pub stringify: bool,
+
+    /// Temporary option to skip `impl<T: Trait> Trait for &mut T` for the
+    /// `wasmtime-wasi` crate while that's given a chance to update its b
+    /// indings.
+    pub skip_mut_forwarding_impls: bool,
 }
 
 #[derive(Debug, Clone)]
@@ -329,14 +335,19 @@ impl Wasmtime {
                 // Only generate a trait signature for free functions since
                 // resource-related functions get their trait signatures
                 // during `type_resource`.
-                if let FunctionKind::Freestanding = func.kind {
+                let sig = if let FunctionKind::Freestanding = func.kind {
                     gen.generate_function_trait_sig(func);
-                }
-                let sig = mem::take(&mut gen.src).into();
+                    Some(mem::take(&mut gen.src).into())
+                } else {
+                    None
+                };
                 gen.generate_add_function_to_linker(TypeOwner::World(world), func, "linker");
                 let add_to_linker = gen.src.into();
-                self.import_functions
-                    .push(ImportFunction { sig, add_to_linker });
+                self.import_functions.push(ImportFunction {
+                    func: func.clone(),
+                    sig,
+                    add_to_linker,
+                });
             }
             WorldItem::Interface(id) => {
                 gen.gen.interface_last_seen_as_import.insert(*id, true);
@@ -546,7 +557,7 @@ impl Wasmtime {
         assert!(prev.is_none());
     }
 
-    fn build_struct(&mut self, resolve: &Resolve, world: WorldId) {
+    fn build_world_struct(&mut self, resolve: &Resolve, world: WorldId) {
         let camel = to_rust_upper_camel_case(&resolve.worlds[world].name);
         uwriteln!(self.src, "pub struct {camel} {{");
         for (name, (ty, _)) in self.exports.fields.iter() {
@@ -554,13 +565,7 @@ impl Wasmtime {
         }
         self.src.push_str("}\n");
 
-        let (async_, async__, send, await_) = if self.opts.async_.maybe_async() {
-            ("async", "_async", ":Send", ".await")
-        } else {
-            ("", "", "", "")
-        };
-
-        self.toplevel_import_trait(resolve, world);
+        self.world_imports_trait(resolve, world);
 
         uwriteln!(self.src, "const _: () = {{");
         uwriteln!(
@@ -572,7 +577,13 @@ impl Wasmtime {
         );
 
         uwriteln!(self.src, "impl {camel} {{");
-        self.toplevel_add_to_linker(resolve, world);
+        self.world_add_to_linker(resolve, world);
+
+        let (async_, async__, send, await_) = if self.opts.async_.maybe_async() {
+            ("async", "_async", ":Send", ".await")
+        } else {
+            ("", "", "", "")
+        };
         uwriteln!(
             self.src,
             "
@@ -650,7 +661,7 @@ impl Wasmtime {
         }
 
         if !self.opts.only_interfaces {
-            self.build_struct(resolve, world)
+            self.build_world_struct(resolve, world)
         }
 
         let imports = mem::take(&mut self.import_interfaces);
@@ -870,12 +881,12 @@ impl Wasmtime {
 }
 
 impl Wasmtime {
-    fn has_world_trait(&self, resolve: &Resolve, world: WorldId) -> bool {
+    fn has_world_imports_trait(&self, resolve: &Resolve, world: WorldId) -> bool {
         !self.import_functions.is_empty() || get_world_resources(resolve, world).count() > 0
     }
 
-    fn toplevel_import_trait(&mut self, resolve: &Resolve, world: WorldId) {
-        if !self.has_world_trait(resolve, world) {
+    fn world_imports_trait(&mut self, resolve: &Resolve, world: WorldId) {
+        if !self.has_world_imports_trait(resolve, world) {
             return;
         }
 
@@ -884,114 +895,184 @@ impl Wasmtime {
             uwriteln!(self.src, "#[wasmtime::component::__internal::async_trait]")
         }
         uwrite!(self.src, "pub trait {world_camel}Imports");
-        for (i, resource) in get_world_resources(resolve, world).enumerate() {
-            if i == 0 {
-                uwrite!(self.src, ": ");
-            } else {
-                uwrite!(self.src, " + ");
-            }
-            uwrite!(self.src, "Host{}", resource.to_upper_camel_case());
+        let mut supertraits = vec![];
+        if self.opts.async_.maybe_async() {
+            supertraits.push("Send".to_string());
+        }
+        for resource in get_world_resources(resolve, world) {
+            supertraits.push(format!("Host{}", resource.to_upper_camel_case()));
+        }
+        if !supertraits.is_empty() {
+            uwrite!(self.src, ": {}", supertraits.join(" + "));
         }
         uwriteln!(self.src, " {{");
         for f in self.import_functions.iter() {
-            self.src.push_str(&f.sig);
-            self.src.push_str("\n");
+            if let Some(sig) = &f.sig {
+                self.src.push_str(sig);
+                self.src.push_str(";\n");
+            }
         }
         uwriteln!(self.src, "}}");
-    }
 
-    fn toplevel_add_to_linker(&mut self, resolve: &Resolve, world: WorldId) {
-        let has_world_trait = self.has_world_trait(resolve, world);
-        if self.import_interfaces.is_empty() && !has_world_trait {
-            return;
-        }
-        let mut interfaces = Vec::new();
-        for (_, name) in self.import_interfaces.iter() {
-            let path = match name {
-                InterfaceName::Remapped { .. } => unreachable!("imported a remapped module"),
-                InterfaceName::Path(path) => path,
-            };
-            interfaces.push(path.join("::"));
-        }
-
-        uwrite!(
+        uwriteln!(
             self.src,
             "
-                pub fn add_to_linker<T, U>(
-                    linker: &mut wasmtime::component::Linker<T>,
-                    get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-                ) -> wasmtime::Result<()>
-                    where U: \
+                pub trait {world_camel}ImportsGetHost<T>:
+                    Fn(T) -> <Self as {world_camel}ImportsGetHost<T>>::Host
+                        + Send
+                        + Sync
+                        + Copy
+                        + 'static
+                {{
+                    type Host: {world_camel}Imports;
+                }}
+
+                impl<F, T, O> {world_camel}ImportsGetHost<T> for F
+                where
+                    F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                    O: {world_camel}Imports
+                {{
+                    type Host = O;
+                }}
             "
         );
-        let world_camel = to_rust_upper_camel_case(&resolve.worlds[world].name);
-        let world_trait = format!("{world_camel}Imports");
-        for (i, name) in interfaces
-            .iter()
-            .map(|n| format!("{n}::Host"))
-            .chain(if has_world_trait {
-                Some(world_trait.clone())
-            } else {
-                None
-            })
-            .enumerate()
-        {
-            if i > 0 {
-                self.src.push_str(" + ");
-            }
-            self.src.push_str(&name);
-        }
 
-        let maybe_send = if self.opts.async_.maybe_async() {
-            " + Send, T: Send"
+        // Generate impl WorldImports for &mut WorldImports
+        let (async_trait, maybe_send) = if self.opts.async_.maybe_async() {
+            (
+                "#[wasmtime::component::__internal::async_trait]\n",
+                "+ Send",
+            )
         } else {
-            ""
+            ("", "")
         };
+        if !self.opts.skip_mut_forwarding_impls {
+            uwriteln!(
+                self.src,
+                "{async_trait}impl<_T: {world_camel}Imports + ?Sized {maybe_send}> {world_camel}Imports for &mut _T {{"
+            );
+            // Forward each method call to &mut T
+            for f in self.import_functions.iter() {
+                if let Some(sig) = &f.sig {
+                    self.src.push_str(sig);
+                    uwrite!(
+                        self.src,
+                        "{{ {world_camel}Imports::{}(*self,",
+                        rust_function_name(&f.func)
+                    );
+                    for (name, _) in f.func.params.iter() {
+                        uwrite!(self.src, "{},", to_rust_ident(name));
+                    }
+                    uwrite!(self.src, ")");
+                    if self.opts.async_.is_import_async(&f.func.name) {
+                        uwrite!(self.src, ".await");
+                    }
+                    uwriteln!(self.src, "}}");
+                }
+            }
+            uwriteln!(self.src, "}}");
+        }
+    }
+
+    fn import_interface_paths(&self) -> Vec<String> {
+        self.import_interfaces
+            .iter()
+            .map(|(_, name)| match name {
+                InterfaceName::Path(path) => path.join("::"),
+                InterfaceName::Remapped { .. } => unreachable!("imported a remapped module"),
+            })
+            .collect()
+    }
 
-        self.src.push_str(maybe_send);
-        self.src.push_str(",\n{\n");
-        for name in interfaces.iter() {
-            uwriteln!(self.src, "{name}::add_to_linker(linker, get)?;");
+    fn world_host_traits(&self, resolve: &Resolve, world: WorldId) -> Vec<String> {
+        let mut traits = self
+            .import_interface_paths()
+            .iter()
+            .map(|path| format!("{path}::Host"))
+            .collect::<Vec<_>>();
+        if self.has_world_imports_trait(resolve, world) {
+            let world_camel = to_rust_upper_camel_case(&resolve.worlds[world].name);
+            traits.push(format!("{world_camel}Imports"));
         }
-        if has_world_trait {
-            uwriteln!(self.src, "Self::add_root_to_linker(linker, get)?;");
+        if self.opts.async_.maybe_async() {
+            traits.push("Send".to_string());
         }
-        uwriteln!(self.src, "Ok(())\n}}");
-        if !has_world_trait {
+        traits
+    }
+
+    fn world_add_to_linker(&mut self, resolve: &Resolve, world: WorldId) {
+        let has_world_imports_trait = self.has_world_imports_trait(resolve, world);
+        if self.import_interfaces.is_empty() && !has_world_imports_trait {
             return;
         }
 
-        uwrite!(
-            self.src,
-            "
-                pub fn add_root_to_linker<T, U>(
-                    linker: &mut wasmtime::component::Linker<T>,
-                    get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
-                ) -> wasmtime::Result<()>
-                    where U: {world_trait}{maybe_send}
-                {{
-                    let mut linker = linker.root();
-            ",
-        );
-        for name in get_world_resources(resolve, world) {
-            let camel = name.to_upper_camel_case();
-            uwriteln!(
+        let camel = to_rust_upper_camel_case(&resolve.worlds[world].name);
+        let data_bounds = if self.opts.async_.maybe_async() {
+            "T: Send,"
+        } else {
+            ""
+        };
+        if has_world_imports_trait {
+            uwrite!(
                 self.src,
-                "linker.resource(
-                    \"{name}\",
-                    wasmtime::component::ResourceType::host::<{camel}>(),
-                    move |mut store, rep| -> wasmtime::Result<()> {{
-                        Host{camel}::drop(get(store.data_mut()), wasmtime::component::Resource::new_own(rep))
-                    }},
-                )?;"
-            )
+                "
+                    pub fn add_to_linker_imports_get_host<T>(
+                        linker: &mut wasmtime::component::Linker<T>,
+                        host_getter: impl for<'a> {camel}ImportsGetHost<&'a mut T>,
+                    ) -> wasmtime::Result<()>
+                        where {data_bounds}
+                    {{
+                        let mut linker = linker.root();
+                "
+            );
+            for name in get_world_resources(resolve, world) {
+                let camel = name.to_upper_camel_case();
+                uwriteln!(
+                    self.src,
+                    "
+                        linker.resource(
+                            \"{name}\",
+                            wasmtime::component::ResourceType::host::<{camel}>(),
+                            move |mut store, rep| -> wasmtime::Result<()> {{
+                                Host{camel}::drop(&mut host_getter(store.data_mut()), wasmtime::component::Resource::new_own(rep))
+                            }},
+                        )?;"
+                );
+            }
+            for f in self.import_functions.iter() {
+                self.src.push_str(&f.add_to_linker);
+                self.src.push_str("\n");
+            }
+            uwriteln!(self.src, "Ok(())\n}}");
         }
 
-        for f in self.import_functions.iter() {
-            self.src.push_str(&f.add_to_linker);
-            self.src.push_str("\n");
+        let host_bounds = format!("U: {}", self.world_host_traits(resolve, world).join(" + "));
+
+        if !self.opts.skip_mut_forwarding_impls {
+            uwriteln!(
+                self.src,
+                "
+                    pub fn add_to_linker<T, U>(
+                        linker: &mut wasmtime::component::Linker<T>,
+                        get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                    ) -> wasmtime::Result<()>
+                        where
+                            {data_bounds}
+                            {host_bounds}
+                    {{
+                "
+            );
+            if has_world_imports_trait {
+                uwriteln!(
+                    self.src,
+                    "Self::add_to_linker_imports_get_host(linker, get)?;"
+                );
+            }
+            for path in self.import_interface_paths() {
+                uwriteln!(self.src, "{path}::add_to_linker(linker, get)?;");
+            }
+            uwriteln!(self.src, "Ok(())\n}}");
         }
-        uwriteln!(self.src, "Ok(())\n}}");
     }
 }
 
@@ -1151,13 +1232,13 @@ impl<'a> InterfaceGenerator<'a> {
                 }
             }
 
+            // Generate resource trait
             if self.gen.opts.async_.maybe_async() {
                 uwriteln!(self.src, "#[wasmtime::component::__internal::async_trait]")
             }
-
             uwriteln!(self.src, "pub trait Host{camel} {{");
 
-            let functions = match resource.owner {
+            let mut functions = match resource.owner {
                 TypeOwner::World(id) => self.resolve.worlds[id]
                     .imports
                     .values()
@@ -1175,16 +1256,16 @@ impl<'a> InterfaceGenerator<'a> {
                 }
             };
 
-            for func in functions {
-                match func.kind {
-                    FunctionKind::Method(resource)
-                    | FunctionKind::Static(resource)
-                    | FunctionKind::Constructor(resource)
-                        if id == resource => {}
-                    _ => continue,
-                }
+            functions.retain(|func| match func.kind {
+                FunctionKind::Freestanding => false,
+                FunctionKind::Method(resource)
+                | FunctionKind::Static(resource)
+                | FunctionKind::Constructor(resource) => id == resource,
+            });
 
+            for func in &functions {
                 self.generate_function_trait_sig(func);
+                self.push_str(";\n");
             }
 
             uwrite!(
@@ -1192,6 +1273,44 @@ impl<'a> InterfaceGenerator<'a> {
                 "fn drop(&mut self, rep: wasmtime::component::Resource<{camel}>) -> wasmtime::Result<()>;");
 
             uwriteln!(self.src, "}}");
+
+            // Generate impl HostResource for &mut HostResource
+            if !self.gen.opts.skip_mut_forwarding_impls {
+                let (async_trait, maybe_send) = if self.gen.opts.async_.maybe_async() {
+                    (
+                        "#[wasmtime::component::__internal::async_trait]\n",
+                        "+ Send",
+                    )
+                } else {
+                    ("", "")
+                };
+                uwriteln!(
+                    self.src,
+                    "{async_trait}impl <_T: Host{camel} + ?Sized {maybe_send}> Host{camel} for &mut _T {{"
+                );
+                for func in &functions {
+                    self.generate_function_trait_sig(func);
+                    uwrite!(
+                        self.src,
+                        "{{ Host{camel}::{}(*self,",
+                        rust_function_name(func)
+                    );
+                    for (name, _) in func.params.iter() {
+                        uwrite!(self.src, "{},", to_rust_ident(name));
+                    }
+                    uwrite!(self.src, ")");
+                    if self.gen.opts.async_.is_import_async(&func.name) {
+                        uwrite!(self.src, ".await");
+                    }
+                    uwriteln!(self.src, "}}");
+                }
+                uwriteln!(self.src, "
+                    fn drop(&mut self, rep: wasmtime::component::Resource<{camel}>) -> wasmtime::Result<()> {{
+                        Host{camel}::drop(*self, rep)
+                    }}",
+                );
+                uwriteln!(self.src, "}}");
+            }
         } else {
             self.rustdoc(docs);
             uwriteln!(
@@ -1749,20 +1868,23 @@ impl<'a> InterfaceGenerator<'a> {
         let iface = &self.resolve.interfaces[id];
         let owner = TypeOwner::Interface(id);
 
-        if self.gen.opts.async_.maybe_async() {
+        let is_maybe_async = self.gen.opts.async_.maybe_async();
+        if is_maybe_async {
             uwriteln!(self.src, "#[wasmtime::component::__internal::async_trait]")
         }
         // Generate the `pub trait` which represents the host functionality for
         // this import which additionally inherits from all resource traits
         // for this interface defined by `type_resource`.
         uwrite!(self.src, "pub trait Host");
-        for (i, resource) in get_resources(self.resolve, id).enumerate() {
-            if i == 0 {
-                uwrite!(self.src, ": ");
-            } else {
-                uwrite!(self.src, " + ");
-            }
-            uwrite!(self.src, "Host{}", resource.to_upper_camel_case());
+        let mut host_supertraits = vec![];
+        if is_maybe_async {
+            host_supertraits.push("Send".to_string());
+        }
+        for resource in get_resources(self.resolve, id) {
+            host_supertraits.push(format!("Host{}", resource.to_upper_camel_case()));
+        }
+        if !host_supertraits.is_empty() {
+            uwrite!(self.src, ": {}", host_supertraits.join(" + "));
         }
         uwriteln!(self.src, " {{");
         for (_, func) in iface.functions.iter() {
@@ -1771,12 +1893,13 @@ impl<'a> InterfaceGenerator<'a> {
                 _ => continue,
             }
             self.generate_function_trait_sig(func);
+            self.push_str(";\n");
         }
 
         // Generate `convert_*` functions to convert custom trappable errors
         // into the representation required by Wasmtime's component API.
         let mut required_conversion_traits = IndexSet::new();
-        let mut errors_converted = IndexSet::new();
+        let mut errors_converted = IndexMap::new();
         let my_error_types = iface
             .types
             .iter()
@@ -1787,9 +1910,10 @@ impl<'a> InterfaceGenerator<'a> {
             .iter()
             .filter_map(|(_, func)| self.special_case_trappable_error(&func.results))
             .map(|(_, id, _)| id);
-        for err in my_error_types.chain(used_error_types).collect::<Vec<_>>() {
-            let custom_name = &self.gen.trappable_errors[&err];
-            let err = &self.resolve.types[resolve_type_definition_id(self.resolve, err)];
+        let root = self.path_to_root();
+        for err_id in my_error_types.chain(used_error_types).collect::<Vec<_>>() {
+            let custom_name = &self.gen.trappable_errors[&err_id];
+            let err = &self.resolve.types[resolve_type_definition_id(self.resolve, err_id)];
             let err_name = err.name.as_ref().unwrap();
             let err_snake = err_name.to_snake_case();
             let err_camel = err_name.to_upper_camel_case();
@@ -1802,8 +1926,7 @@ impl<'a> InterfaceGenerator<'a> {
                     required_conversion_traits.insert(format!("{path}::Host"));
                 }
                 None => {
-                    if errors_converted.insert(err_name) {
-                        let root = self.path_to_root();
+                    if errors_converted.insert(err_name, err_id).is_none() {
                         uwriteln!(
                             self.src,
                             "fn convert_{err_snake}(&mut self, err: {root}{custom_name}) -> wasmtime::Result<{err_camel}>;"
@@ -1814,25 +1937,41 @@ impl<'a> InterfaceGenerator<'a> {
         }
         uwriteln!(self.src, "}}");
 
-        let mut where_clause = if self.gen.opts.async_.maybe_async() {
-            "T: Send, U: Host + Send".to_string()
+        let (data_bounds, mut host_bounds) = if self.gen.opts.async_.maybe_async() {
+            ("T: Send,", "Host + Send".to_string())
         } else {
-            "U: Host".to_string()
+            ("", "Host".to_string())
         };
-
-        for t in required_conversion_traits {
-            where_clause.push_str(" + ");
-            where_clause.push_str(&t);
+        for ty in required_conversion_traits {
+            uwrite!(host_bounds, " + {ty}");
         }
 
         uwriteln!(
             self.src,
             "
-                pub fn add_to_linker<T, U>(
+                pub trait GetHost<T>:
+                    Fn(T) -> <Self as GetHost<T>>::Host
+                        + Send
+                        + Sync
+                        + Copy
+                        + 'static
+                {{
+                    type Host: {host_bounds};
+                }}
+
+                impl<F, T, O> GetHost<T> for F
+                where
+                    F: Fn(T) -> O + Send + Sync + Copy + 'static,
+                    O: {host_bounds},
+                {{
+                    type Host = O;
+                }}
+
+                pub fn add_to_linker_get_host<T>(
                     linker: &mut wasmtime::component::Linker<T>,
-                    get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                    host_getter: impl for<'a> GetHost<&'a mut T>,
                 ) -> wasmtime::Result<()>
-                    where {where_clause}
+                    where {data_bounds}
                 {{
             "
         );
@@ -1846,7 +1985,7 @@ impl<'a> InterfaceGenerator<'a> {
                     \"{name}\",
                     wasmtime::component::ResourceType::host::<{camel}>(),
                     move |mut store, rep| -> wasmtime::Result<()> {{
-                        Host{camel}::drop(get(store.data_mut()), wasmtime::component::Resource::new_own(rep))
+                        Host{camel}::drop(&mut host_getter(store.data_mut()), wasmtime::component::Resource::new_own(rep))
                     }},
                 )?;"
             )
@@ -1857,6 +1996,68 @@ impl<'a> InterfaceGenerator<'a> {
         }
         uwriteln!(self.src, "Ok(())");
         uwriteln!(self.src, "}}");
+
+        if !self.gen.opts.skip_mut_forwarding_impls {
+            // Generate add_to_linker (with closure)
+            uwriteln!(
+                self.src,
+                "
+                pub fn add_to_linker<T, U>(
+                    linker: &mut wasmtime::component::Linker<T>,
+                    get: impl Fn(&mut T) -> &mut U + Send + Sync + Copy + 'static,
+                ) -> wasmtime::Result<()>
+                    where
+                        U: {host_bounds}, {data_bounds}
+                {{
+                    add_to_linker_get_host(linker, get)
+                }}
+                "
+            );
+
+            // Generate impl Host for &mut Host
+            let (async_trait, maybe_send) = if is_maybe_async {
+                (
+                    "#[wasmtime::component::__internal::async_trait]\n",
+                    "+ Send",
+                )
+            } else {
+                ("", "")
+            };
+
+            uwriteln!(
+                self.src,
+                "{async_trait}impl<_T: Host + ?Sized {maybe_send}> Host for &mut _T {{"
+            );
+            // Forward each method call to &mut T
+            for (_, func) in iface.functions.iter() {
+                match func.kind {
+                    FunctionKind::Freestanding => {}
+                    _ => continue,
+                }
+                self.generate_function_trait_sig(func);
+                uwrite!(self.src, "{{ Host::{}(*self,", rust_function_name(func));
+                for (name, _) in func.params.iter() {
+                    uwrite!(self.src, "{},", to_rust_ident(name));
+                }
+                uwrite!(self.src, ")");
+                if self.gen.opts.async_.is_import_async(&func.name) {
+                    uwrite!(self.src, ".await");
+                }
+                uwriteln!(self.src, "}}");
+            }
+            for (err_name, err_id) in errors_converted {
+                uwriteln!(
+                    self.src,
+                    "fn convert_{err_snake}(&mut self, err: {root}{custom_name}) -> wasmtime::Result<{err_camel}> {{
+                        Host::convert_{err_snake}(*self, err)
+                    }}",
+                    custom_name = self.gen.trappable_errors[&err_id],
+                    err_snake = err_name.to_snake_case(),
+                    err_camel = err_name.to_upper_camel_case(),
+                );
+            }
+            uwriteln!(self.src, "}}");
+        }
     }
 
     fn generate_add_function_to_linker(&mut self, owner: TypeOwner, func: &Function, linker: &str) {
@@ -1938,7 +2139,8 @@ impl<'a> InterfaceGenerator<'a> {
             );
         }
 
-        self.src.push_str("let host = get(caller.data_mut());\n");
+        self.src
+            .push_str("let host = &mut host_getter(caller.data_mut());\n");
         let func_name = rust_function_name(func);
         let host_trait = match func.kind {
             FunctionKind::Freestanding => match owner {
@@ -2057,8 +2259,6 @@ impl<'a> InterfaceGenerator<'a> {
             self.print_result_ty(&func.results, TypeMode::Owned);
             self.push_str(">");
         }
-
-        self.push_str(";\n");
     }
 
     fn extract_typed_function(&mut self, func: &Function) -> (String, String) {
diff --git a/tests/all/component_model/bindgen.rs b/tests/all/component_model/bindgen.rs
index 0a6bc363684..71397b9a06c 100644
--- a/tests/all/component_model/bindgen.rs
+++ b/tests/all/component_model/bindgen.rs
@@ -325,6 +325,9 @@ mod async_config {
             package foo:foo;
 
             world t1 {
+                import foo: interface {
+                    foo: func();
+                }
                 import x: func();
                 import y: func();
                 export z: func();