diff --git a/appveyor.yml b/appveyor.yml
index fff1b1a..c158d0f 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -34,5 +34,5 @@ install:
   - set GSTREAMER_1_0_ROOT_X86=C:\gstreamer\1.0\x86
 
 build_script:
-  - $(QTDIR)\bin\qmake.exe mapmap.pro
+  - %QTDIR%\bin\qmake.exe mapmap.pro
   - mingw32-make