diff --git a/scrypt/example_test.go b/scrypt/example_test.go
index b6a8ccb..6736479 100644
--- a/scrypt/example_test.go
+++ b/scrypt/example_test.go
@@ -1,3 +1,7 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package scrypt_test
 
 import (