diff --git a/engine/src/flutter/lib/web_ui/lib/src/engine/js_interop/js_promise.dart b/engine/src/flutter/lib/web_ui/lib/src/engine/js_interop/js_promise.dart
index 13327158ae..45f3f3b348 100644
--- a/engine/src/flutter/lib/web_ui/lib/src/engine/js_interop/js_promise.dart
+++ b/engine/src/flutter/lib/web_ui/lib/src/engine/js_interop/js_promise.dart
@@ -9,6 +9,7 @@ import 'package:js/js.dart';
 
 /// Type-safe JS Promises
 @JS('Promise')
+@staticInterop
 abstract class Promise<T> {
   /// A constructor for a JS promise
   external factory Promise(PromiseExecutor<T> executor);