diff --git a/engine/src/flutter/examples/hello_world/hello_world.dart b/engine/src/flutter/examples/hello_world/hello_world.dart
index 0ad7536b59..e20978844d 100644
--- a/engine/src/flutter/examples/hello_world/hello_world.dart
+++ b/engine/src/flutter/examples/hello_world/hello_world.dart
@@ -5,7 +5,7 @@
 import 'package:sky/framework/fn.dart';
 
 class HelloWorldApp extends App {
-  Node build() {
+  UINode build() {
     return new Text('Hello, world!');
   }
 }