diff --git a/mk/windoze/build-mg.bat b/mk/windoze/build-mg.bat
index 0c3fcade..bb9169fc 100644
--- a/mk/windoze/build-mg.bat
+++ b/mk/windoze/build-mg.bat
@@ -15,10 +15,15 @@ GOTO SVNSECTION
 
 :SETVCVARS
 
+IF EXIST "%VS90COMNTOOLS%..\..\"                             GOTO VC_Common
 IF EXIST "\Program Files\Microsoft Visual Studio 9.0\"       GOTO VC_32
 IF EXIST "\Program Files (x86)\Microsoft Visual Studio 9.0\" GOTO VC_64
 goto SVNSECTION
 
+:VC_Common
+call "%VS90COMNTOOLS%..\..\vc\vcvarsall.bat"
+goto SVNSECTION
+
 :VC_32
 ECHO 32 bit Windows detected...
 call "\Program Files\Microsoft Visual Studio 9.0\vc\vcvarsall.bat"