diff --git a/public/app/plugins/datasource/stackdriver/components/VariableQueryEditor.tsx b/public/app/plugins/datasource/stackdriver/components/VariableQueryEditor.tsx
index 949fa96e0a7..384e055de0d 100644
--- a/public/app/plugins/datasource/stackdriver/components/VariableQueryEditor.tsx
+++ b/public/app/plugins/datasource/stackdriver/components/VariableQueryEditor.tsx
@@ -140,7 +140,7 @@ export class StackdriverVariableQueryEditor extends PureComponent<VariableQueryP
   }
 
   onLabelKeyChange(labelKey: string) {
-    this.setState({ labelKey });
+    this.setState({ labelKey }, () => this.onPropsChange());
   }
 
   componentDidUpdate(prevProps: Readonly<VariableQueryProps>, prevState: Readonly<VariableQueryData>) {