diff --git a/win_installer/build1.bat b/win_installer/build1.bat
index af3b48bb4..df211006a 100755
--- a/win_installer/build1.bat
+++ b/win_installer/build1.bat
@@ -1,5 +1,5 @@
 
-set QTBASE=c:\Qt\2009.01
+set QTBASE=c:\Qt\2009.05
 set QTDIR=%QTBASE%\qt
 set PATH=%QTDIR%\bin
 set PATH=%PATH%;%QTBASE%\bin;%QTBASE%\mingw\bin