diff --git a/appveyor.yml b/appveyor.yml
index 4377ed74f2..8f5a9d8294 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -10,7 +10,7 @@ environment:
 
 install:
 - appveyor DownloadFile http://download.xamarin.com/GTKforWindows/Windows/gtk-sharp-2.12.26.msi
-- msiexec /i gtk-sharp-2.12.26.msi /qn /norestart
+- start /wait msiexec /i gtk-sharp-2.12.26.msi /qn /norestart
 
 configuration:
   - Release