diff --git a/vop/cmProcTemplateMain.h b/vop/cmProcTemplateMain.h
index 336b381..e62132b 100644
--- a/vop/cmProcTemplateMain.h
+++ b/vop/cmProcTemplateMain.h
@@ -73,3 +73,5 @@
 
 #include "cmProcTemplateHdr.h"
 #include "cmProcTemplateCode.h"
+
+#include "cmProcTemplateUndef.h"