diff --git a/util/templates/defaults.yaml b/util/templates/defaults.yaml
index 46c310184..c06e06b90 100644
--- a/util/templates/defaults.yaml
+++ b/util/templates/defaults.yaml
@@ -414,6 +414,7 @@ params:
     description:
       de: Intervall
       en: Interval
+    type: duration
   - name: mac
     private: true
     description: