diff --git a/pkg/sympath/walk.go b/pkg/sympath/walk.go
index bada1dbfb..77fa04153 100644
--- a/pkg/sympath/walk.go
+++ b/pkg/sympath/walk.go
@@ -1,4 +1,9 @@
 /*
+Copyright (c) for portions of walk.go are held by The Go Authors, 2009 and are provided under
+the BSD license.
+
+https://github.com/golang/go/blob/master/LICENSE
+
 Copyright 2017 The Kubernetes Authors All rights reserved.
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
diff --git a/pkg/sympath/walk_test.go b/pkg/sympath/walk_test.go
index 298042281..442cb9ab1 100644
--- a/pkg/sympath/walk_test.go
+++ b/pkg/sympath/walk_test.go
@@ -1,4 +1,9 @@
 /*
+Copyright (c) for portions of walk_test.go are held by The Go Authors, 2009 and are provided under
+the BSD license.
+
+https://github.com/golang/go/blob/master/LICENSE
+
 Copyright 2017 The Kubernetes Authors All rights reserved.
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.