diff --git a/src/Components/Web.JS/src/Boot.WebAssembly.Common.ts b/src/Components/Web.JS/src/Boot.WebAssembly.Common.ts
index 7efd32e495f4..3f3b27ee74de 100644
--- a/src/Components/Web.JS/src/Boot.WebAssembly.Common.ts
+++ b/src/Components/Web.JS/src/Boot.WebAssembly.Common.ts
@@ -97,8 +97,8 @@ async function startCore(components: RootComponentManager<WebAssemblyComponentDe
     }
   });
 
-  Blazor._internal.applyHotReload = (id: string, metadataDelta: string, ilDelta: string, pdbDelta: string | undefined) => {
-    dispatcher.invokeDotNetStaticMethod('Microsoft.AspNetCore.Components.WebAssembly', 'ApplyHotReloadDelta', id, metadataDelta, ilDelta, pdbDelta);
+  Blazor._internal.applyHotReload = (id: string, metadataDelta: string, ilDelta: string, pdbDelta: string | undefined, updatedTypes?: number[]) => {
+    dispatcher.invokeDotNetStaticMethod('Microsoft.AspNetCore.Components.WebAssembly', 'ApplyHotReloadDelta', id, metadataDelta, ilDelta, pdbDelta, updatedTypes ?? null);
   };
 
   Blazor._internal.getApplyUpdateCapabilities = () => dispatcher.invokeDotNetStaticMethod('Microsoft.AspNetCore.Components.WebAssembly', 'GetApplyUpdateCapabilities');
diff --git a/src/Components/Web.JS/src/GlobalExports.ts b/src/Components/Web.JS/src/GlobalExports.ts
index 6bc48be0bb40..c3194481528b 100644
--- a/src/Components/Web.JS/src/GlobalExports.ts
+++ b/src/Components/Web.JS/src/GlobalExports.ts
@@ -89,7 +89,7 @@ export interface IBlazor {
     }
 
     // APIs invoked by hot reload
-    applyHotReload?: (id: string, metadataDelta: string, ilDelta: string, pdbDelta: string | undefined) => void;
+    applyHotReload?: (id: string, metadataDelta: string, ilDelta: string, pdbDelta: string | undefined, updatedTypes?: number[]) => void;
     getApplyUpdateCapabilities?: () => string;
     hotReloadApplied?: () => void;
   }
diff --git a/src/Components/WebAssembly/WebAssembly/src/HotReload/WebAssemblyHotReload.cs b/src/Components/WebAssembly/WebAssembly/src/HotReload/WebAssemblyHotReload.cs
index 29cee6e31681..2a1d64c3be98 100644
--- a/src/Components/WebAssembly/WebAssembly/src/HotReload/WebAssemblyHotReload.cs
+++ b/src/Components/WebAssembly/WebAssembly/src/HotReload/WebAssemblyHotReload.cs
@@ -43,7 +43,7 @@ internal static async Task InitializeAsync()
     /// For framework use only.
     /// </summary>
     [JSInvokable(nameof(ApplyHotReloadDelta))]
-    public static void ApplyHotReloadDelta(string moduleIdString, byte[] metadataDelta, byte[] ilDelta, byte[] pdbBytes)
+    public static void ApplyHotReloadDelta(string moduleIdString, byte[] metadataDelta, byte[] ilDelta, byte[] pdbBytes, int[] updatedTypes)
     {
         // Analyzer has a bug where it doesn't handle ConditionalAttribute: https://github.com/dotnet/roslyn/issues/63464
 #pragma warning disable IDE0200 // Remove unnecessary lambda expression
@@ -56,6 +56,7 @@ public static void ApplyHotReloadDelta(string moduleIdString, byte[] metadataDel
         _updateDeltas[0].MetadataDelta = metadataDelta;
         _updateDeltas[0].ILDelta = ilDelta;
         _updateDeltas[0].PdbBytes = pdbBytes;
+        _updateDeltas[0].UpdatedTypes = updatedTypes;
 
         _hotReloadAgent.ApplyDeltas(_updateDeltas);
     }