diff --git a/doc/progs/slices.go b/doc/progs/slices.go
index be4322a328..72fb4b7c17 100644
--- a/doc/progs/slices.go
+++ b/doc/progs/slices.go
@@ -1,3 +1,7 @@
+// Copyright 2012 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 main
 
 import (