diff --git a/Source/MFCDialog/CMakeSetupDialog.cpp b/Source/MFCDialog/CMakeSetupDialog.cpp
index 2774b2b22..4b9e2dc2e 100644
--- a/Source/MFCDialog/CMakeSetupDialog.cpp
+++ b/Source/MFCDialog/CMakeSetupDialog.cpp
@@ -2,6 +2,8 @@
 //
 
 #include "stdafx.h"
+// a fun undef for DOT NET
+#undef DEBUG
 #include "CMakeSetup.h"
 #include "MakeHelp.h"
 #include "PathDialog.h"