diff --git a/src/runtime/pprof/internal/profile/profile_memmap.go b/src/runtime/pprof/internal/profile/profile_memmap.go
index bb6cff60e0..774c03ad69 100644
--- a/src/runtime/pprof/internal/profile/profile_memmap.go
+++ b/src/runtime/pprof/internal/profile/profile_memmap.go
@@ -1,3 +1,7 @@
+// Copyright 2016 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 profile
 
 import (