diff --git a/appveyor.yml b/appveyor.yml
index 25a2ba5b7b..4377ed74f2 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -8,6 +8,10 @@ environment:
   myget_key:
     secure: XOgD5bJUKNOS2kDDgb+affS4pDcslxALh+xvvnr1Koy0PjXlhILsBdNhxRe0KcNm
 
+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
+
 configuration:
   - Release