diff --git a/src/subscription/index.js b/src/subscription/index.js
index 11b0a7f26d..2d31f69503 100644
--- a/src/subscription/index.js
+++ b/src/subscription/index.js
@@ -1 +1,12 @@
+/**
+ * Copyright (c) 2017, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @flow
+ */
+
 export { subscribe, createSourceEventStream } from './subscribe';