diff --git a/pkgs/dartpad_ui/lib/embed.dart b/pkgs/dartpad_ui/lib/embed.dart
index 61d1b1ca8..820a3765e 100644
--- a/pkgs/dartpad_ui/lib/embed.dart
+++ b/pkgs/dartpad_ui/lib/embed.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2024, the Dart project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 import 'dart:js_interop';
 
 import 'package:web/web.dart' as web;