diff --git a/BaseTools/Source/Python/Makefile b/BaseTools/Source/Python/Makefile
index 4044fcefeb..d3f1baa831 100644
--- a/BaseTools/Source/Python/Makefile
+++ b/BaseTools/Source/Python/Makefile
@@ -59,6 +59,7 @@ COMMON_PYTHON=$(BASE_TOOLS_PATH)\Source\Python\Common\BuildToolError.py \
               $(BASE_TOOLS_PATH)\Source\Python\Common\ToolDefClassObject.py \
               $(BASE_TOOLS_PATH)\Source\Python\Common\VpdInfoFile.py \
               $(BASE_TOOLS_PATH)\Source\Python\Common\BuildVersion.py \
+              $(BASE_TOOLS_PATH)\Source\Python\Common\MultipleWorkspace.py \
               $(BASE_TOOLS_PATH)\Source\Python\CommonDataClass\CommonClass.py \
               $(BASE_TOOLS_PATH)\Source\Python\CommonDataClass\DataClass.py \
               $(BASE_TOOLS_PATH)\Source\Python\CommonDataClass\Exceptions.py \