diff --git a/vars/addCurrentGitTag.groovy b/vars/addCurrentGitTag.groovy
index 52ca9b5..98d549d 100644
--- a/vars/addCurrentGitTag.groovy
+++ b/vars/addCurrentGitTag.groovy
@@ -1,6 +1,6 @@
 #!/usr/bin/env groovy
 
-String call(Map config = [:]) {
+Map call(Map config = [:]) {
     Map defaults = [
         dirtyFlag: '-dirty'
     ]