diff --git a/sdk/Sdk/Targets/Microsoft.Azure.Functions.Worker.Sdk.targets b/sdk/Sdk/Targets/Microsoft.Azure.Functions.Worker.Sdk.targets
index bc5f36054..5645e7e8a 100644
--- a/sdk/Sdk/Targets/Microsoft.Azure.Functions.Worker.Sdk.targets
+++ b/sdk/Sdk/Targets/Microsoft.Azure.Functions.Worker.Sdk.targets
@@ -39,7 +39,7 @@ WARNING:  DO NOT MODIFY this file unless you are knowledgeable about MSBuild and
         <FunctionsEnableMetadataSourceGen>$(FunctionsEnableWorkerIndexing)</FunctionsEnableMetadataSourceGen>
         <FunctionsAutoRegisterGeneratedMetadataProvider>$(FunctionsEnableWorkerIndexing)</FunctionsAutoRegisterGeneratedMetadataProvider>
 
-        <FunctionsEnableExecutorSourceGen Condition="$(FunctionsEnableExecutorSourceGen) == ''">false</FunctionsEnableExecutorSourceGen>
+        <FunctionsEnableExecutorSourceGen Condition="$(FunctionsEnableExecutorSourceGen) == '' Or $(FunctionsEnableExecutorSourceGen)">true</FunctionsEnableExecutorSourceGen>
         <FunctionsAutoRegisterGeneratedFunctionsExecutor Condition="$(FunctionsAutoRegisterGeneratedFunctionsExecutor) == ''">true</FunctionsAutoRegisterGeneratedFunctionsExecutor>
         <FunctionsAutoRegisterGeneratedFunctionsExecutor Condition="$(FunctionsAutoRegisterGeneratedFunctionsExecutor)">true</FunctionsAutoRegisterGeneratedFunctionsExecutor>
     </PropertyGroup>
diff --git a/sdk/release_notes.md b/sdk/release_notes.md
index 38c6714c0..25024f7c3 100644
--- a/sdk/release_notes.md
+++ b/sdk/release_notes.md
@@ -6,5 +6,7 @@
 
 ### Microsoft.Azure.Functions.Worker.Sdk 1.16.0 (meta package)
 
+- Default to optimized function executor.
+    * If you have `<FunctionsEnableExecutorSourceGen>True</FunctionsEnableExecutorSourceGen>` in your `.csproj` file, you can remove that line after upgrading Azure.Functions.Worker.Sdk version 1.16.0 or later.
 - Default to source-generated function metadata (#1968).
     * If you have `<FunctionsEnableWorkerIndexing>True</FunctionsEnableWorkerIndexing>` in your `.csproj` file, you can remove that line after upgrading Azure.Functions.Worker.Sdk version 1.16.0 or later.
\ No newline at end of file