diff --git a/src/createmaptoolsprojects.bat b/src/createmaptoolsprojects.bat
index e21a53ff..0b1705f3 100644
--- a/src/createmaptoolsprojects.bat
+++ b/src/createmaptoolsprojects.bat
@@ -1 +1 @@
-devtools\bin\vpc.exe +maptools /mksln maptools.sln
+devtools\bin\vpc.exe /define:SOURCESDK +maptools /mksln maptools.sln