diff --git a/lib/pages/demo.dart b/lib/pages/demo.dart
index b06f98f2d8..3bbd4ac33e 100644
--- a/lib/pages/demo.dart
+++ b/lib/pages/demo.dart
@@ -167,7 +167,7 @@ class _GalleryDemoPageState extends State<GalleryDemoPage>
 
     if (await canLaunchUrlString(url)) {
       await launchUrlString(url);
-    } else if (mounted) {
+    } else if (context.mounted) {
       await showDialog<void>(
         context: context,
         builder: (context) {