diff --git a/v1/lib/core/CodeTabsMarkdownBlock.js b/v1/lib/core/CodeTabsMarkdownBlock.js
index 8519989848..3a19a4a8bd 100644
--- a/v1/lib/core/CodeTabsMarkdownBlock.js
+++ b/v1/lib/core/CodeTabsMarkdownBlock.js
@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) 2017-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 import _ from 'lodash';
 
 const React = require('react');