diff --git a/appveyor.yml b/appveyor.yml
index f8ceacac..09bf5f27 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -74,6 +74,10 @@ install:
   # See http://help.appveyor.com/discussions/problems/2569-latest-appveyor-build-platform-update-introduced-a-python-problem.
   - "reg delete HKEY_CLASSES_ROOT\\.py\\OpenWithProgids /f"
 
+  # From http://help.appveyor.com/discussions/problems/2569-latest-appveyor-build-platform-update-introduced-a-python-problem#comment_38756340
+  - ps: cmd /c ftype Python.File="C:\Windows\py.exe" "%1" %*
+  - ftype Python.File
+
 build_script:
   # Without this Appveyor complains it can't find a solution file.
   - "echo NO-OP"