diff --git a/benches/bench.rs b/benches/bench.rs
index 7a3c07e..8bc58d3 100644
--- a/benches/bench.rs
+++ b/benches/bench.rs
@@ -1,6 +1,9 @@
 #![feature(test)]
 #![allow(deprecated)]
 
+#[cfg(benchmark)]
+extern crate foo;
+
 #[macro_use]
 extern crate smallvec;
 extern crate test;
diff --git a/src/lib.rs b/src/lib.rs
index 447f3cd..7912005 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -86,6 +86,7 @@ extern crate std;
 #[cfg(test)]
 mod tests;
 
+#[allow(deprecated)]
 use alloc::alloc::{Layout, LayoutErr};
 use alloc::boxed::Box;
 use alloc::{vec, vec::Vec};
@@ -238,6 +239,7 @@ impl fmt::Display for CollectionAllocErr {
     }
 }
 
+#[allow(deprecated)]
 impl From<LayoutErr> for CollectionAllocErr {
     fn from(_: LayoutErr) -> Self {
         CollectionAllocErr::CapacityOverflow