diff --git a/vars/packageStep.groovy b/vars/packageStep.groovy
index dad988c..84441b7 100644
--- a/vars/packageStep.groovy
+++ b/vars/packageStep.groovy
@@ -2,7 +2,8 @@
 
 void call(Map config = [:]) {
     Map defaults = [
-        artifacts: []
+        artifacts: [],
+        tag: 'Unknown'
     ]
     Map runConfig = defaults + config