diff --git a/tools/run_tests/build_artifact_csharp.bat b/tools/run_tests/build_artifact_csharp.bat
index 49a8ada6acb..33dc8c25aea 100644
--- a/tools/run_tests/build_artifact_csharp.bat
+++ b/tools/run_tests/build_artifact_csharp.bat
@@ -3,7 +3,7 @@
 @call vsprojects\build_vs2013.bat %* || goto :error
 
 mkdir artifacts
-copy /Y vsprojects\Release\grpc_csharp_ext.dll artifacts || goto :error
+copy /Y vsprojects\Release\grpc_csharp_ext.dll artifacts || copy /Y vsprojects\x64\Release\grpc_csharp_ext.dll artifacts || goto :error
 
 goto :EOF