diff --git a/web/app/components/base/prompt-editor/plugins/workflow-variable-block/component.tsx b/web/app/components/base/prompt-editor/plugins/workflow-variable-block/component.tsx
index 2f6c3374a7..50ff29633a 100644
--- a/web/app/components/base/prompt-editor/plugins/workflow-variable-block/component.tsx
+++ b/web/app/components/base/prompt-editor/plugins/workflow-variable-block/component.tsx
@@ -144,7 +144,7 @@ const WorkflowVariableBlockComponent = ({
   }
 
   if (!node)
-    return null
+    return Item
 
   return (
     <Tooltip