diff --git a/backend_qt4/build_QtZint2.cmd b/backend_qt4/build_QtZint2.cmd
index b10ece43..9111ac63 100644
--- a/backend_qt4/build_QtZint2.cmd
+++ b/backend_qt4/build_QtZint2.cmd
@@ -1,3 +1,3 @@
 rem start Visual Studio Command Prompt
-qmake backend_lib.pro
+qmake backend_vcx.pro
 msbuild QtZint2.vcxproj /t:Rebuild /p:Configuration=Release
\ No newline at end of file