diff --git a/tools/validate-all-yaml.sh b/tools/validate-all-yaml.sh
index b19cfe18af..bab2133b5f 100755
--- a/tools/validate-all-yaml.sh
+++ b/tools/validate-all-yaml.sh
@@ -3,6 +3,6 @@
 REAL_PATH=$(python -c "import os,sys;print os.path.realpath('$0')")
 cd "$(dirname "$REAL_PATH")/.."
 
-find . -name '*.yaml' -print0 |
+find . -name '*.yaml' -o -name '*.yml' -print0 |
     xargs -0 python tools/validate-yaml.py || exit 1