diff --git a/sdk/Sdk/Targets/Microsoft.Azure.Functions.Worker.Sdk.targets b/sdk/Sdk/Targets/Microsoft.Azure.Functions.Worker.Sdk.targets
index 5645e7e8a..bc5f36054 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) == '' Or $(FunctionsEnableExecutorSourceGen)">true</FunctionsEnableExecutorSourceGen>
+        <FunctionsEnableExecutorSourceGen Condition="$(FunctionsEnableExecutorSourceGen) == ''">false</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 f24a5ed25..577369971 100644
--- a/sdk/release_notes.md
+++ b/sdk/release_notes.md
@@ -14,7 +14,7 @@
 
 ### Microsoft.Azure.Functions.Worker.Sdk.Generators <version>
 
+- Reverted: Default to optimized function executor (#2012)
 - Updated source generated versions of IFunctionExecutor to use `global::` namespace prefix to avoid build errors for function class with the same name as its containing namespace. (#1993)
 - Updated source generated versions of IFunctionExecutor to include XML documentation for all public types and members
 - Updated source generated versions of IFunctionMedatadaProvider to include XML documentation for all public types and members
-