diff --git a/Heizung_x_Stufig/form.json b/Heizung_x_Stufig/form.json
index 0953949..065ad46 100644
--- a/Heizung_x_Stufig/form.json
+++ b/Heizung_x_Stufig/form.json
@@ -75,7 +75,9 @@
                     "width": "400px",
                     "add": 0,
                     "edit": {
-                        "type": "SelectVariable"
+                        "type": "SelectVariable",
+                        "validVariableTypes": [0],
+                        "requiredAction": 1
                     }
                 }
             ]