diff --git a/engine/src/flutter/lib/web_ui/lib/src/engine/window.dart b/engine/src/flutter/lib/web_ui/lib/src/engine/window.dart
index b9a86bc6702..6e422b1aacd 100644
--- a/engine/src/flutter/lib/web_ui/lib/src/engine/window.dart
+++ b/engine/src/flutter/lib/web_ui/lib/src/engine/window.dart
@@ -141,6 +141,9 @@ class EngineWindow extends ui.Window {
             domRenderer.setTitle(arguments['label']);
             domRenderer.setThemeColor(ui.Color(arguments['primaryColor']));
             return;
+          case 'SystemSound.play':
+            // There are no default system sounds on web.
+            return;
         }
         break;