diff --git a/example/lib/place_symbol.dart b/example/lib/place_symbol.dart
index 530e60a4..87300169 100644
--- a/example/lib/place_symbol.dart
+++ b/example/lib/place_symbol.dart
@@ -260,8 +260,8 @@ class PlaceSymbolBodyState extends State<PlaceSymbolBody> {
     setState(() {
       _iconAllowOverlap = !_iconAllowOverlap;
     });
-    controller!.setSymbolIconAllowOverlap(_iconAllowOverlap);
-    controller!.setSymbolTextAllowOverlap(_iconAllowOverlap);
+    await controller!.setSymbolIconAllowOverlap(_iconAllowOverlap);
+    await controller!.setSymbolTextAllowOverlap(_iconAllowOverlap);
   }
 
   @override