diff --git a/set-env.sh b/set-env.sh
index e9e67ed..77c1185 100644
--- a/set-env.sh
+++ b/set-env.sh
@@ -4,7 +4,7 @@ set -ex
 
 VERSION=`cat VERSION`
 
-if [[ $GITHUB_REF == "master" ]]; then
+if [[ $GITHUB_REF == "refs/heads/master" ]]; then
     echo "::set-env name=TAGS::latest,${VERSION}"
 else
     echo "::set-env name=TAGS::dev,${VERSION}-dev"