diff --git a/src/accessibility.ts b/src/accessibility.ts
index 7edfc99f88..1c8d443ec7 100644
--- a/src/accessibility.ts
+++ b/src/accessibility.ts
@@ -1,5 +1,6 @@
 /**
- * Copyright (c) Microsoft Corporation.
+ * Copyright 2018 Google Inc. All rights reserved.
+ * Modifications copyright (c) Microsoft Corporation.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.