diff --git a/libgo/runtime/mgc0.c b/libgo/runtime/mgc0.c
index 6864a833dc4..dda184568c7 100644
--- a/libgo/runtime/mgc0.c
+++ b/libgo/runtime/mgc0.c
@@ -1,4 +1,4 @@
-
+// Copyright 2009 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.