diff --git a/examples/stocks2/lib/stock_app.dart b/examples/stocks2/lib/stock_app.dart
index 2398238cd43..70e13900c93 100644
--- a/examples/stocks2/lib/stock_app.dart
+++ b/examples/stocks2/lib/stock_app.dart
@@ -27,6 +27,7 @@ class StocksApp extends App {
   }
 
   void didMount() {
+    super.didMount();
     new StockDataFetcher((StockData data) {
       setState(() {
         data.appendTo(_stocks);