diff --git a/tracker/storage.go b/tracker/storage.go
index 5cc2a65..b803fe9 100644
--- a/tracker/storage.go
+++ b/tracker/storage.go
@@ -1,3 +1,7 @@
+// Copyright 2014 The Chihaya Authors. All rights reserved.
+// Use of this source code is governed by the BSD 2-Clause license,
+// which can be found in the LICENSE file.
+
 package tracker
 
 import (