diff --git a/appveyor.yml b/appveyor.yml
index 1c2e2562f..3dab27be5 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -19,7 +19,7 @@ test:
 after_test:
 - python BuildTools\tidy.py
 for:
-  branches:
+- branches:
     only:
       - master
 artifacts: