diff --git a/build/SharedFx.targets b/build/SharedFx.targets
index affdaa4878..326558dcb3 100644
--- a/build/SharedFx.targets
+++ b/build/SharedFx.targets
@@ -480,14 +480,14 @@
     <MSBuild Projects="$(MSBuildProjectFullPath)" Targets="_BuildSharedFxSymbols" Properties="$(AllSymbolsArguments)" />
 
     <!-- Replace assemblies with crossgen output -->
-    <!-- <Copy
+    <Copy
       SourceFiles="$(AppSharedFxCrossgenDirectory)%(AppCrossGenOutput.RecursiveDir)%(AppCrossGenOutput.FileName)%(AppCrossGenOutput.Extension)"
       DestinationFiles="$(SharedFxIntermediateOutputPath)%(AppCrossGenOutput.RecursiveDir)%(AppCrossGenOutput.FileName)%(AppCrossGenOutput.Extension)"
       OverwriteReadOnlyFiles="True" />
     <Copy
       SourceFiles="$(AllSharedFxCrossgenDirectory)%(AllCrossGenOutput.RecursiveDir)%(AllCrossGenOutput.FileName)%(AllCrossGenOutput.Extension)"
       DestinationFiles="$(SharedFxIntermediateOutputPath)%(AllCrossGenOutput.RecursiveDir)%(AllCrossGenOutput.FileName)%(AllCrossGenOutput.Extension)"
-      OverwriteReadOnlyFiles="True" /> -->
+      OverwriteReadOnlyFiles="True" />
 
     <ItemGroup>
       <OutputZipFiles Include="$(SharedFxIntermediateOutputPath)**\*" />