diff --git a/tools/run_tests/build_artifact_csharp.bat b/tools/run_tests/build_artifact_csharp.bat
index 49a8ada6acbca3f7c1a0b466b24a9939a0605c17..33dc8c25aeabd05facbdadc87b91a243f8b5d8c2 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