diff --git a/test/codegen/bits.go b/test/codegen/bits.go
index 28fef4b4ae..3c5ad2bce7 100644
--- a/test/codegen/bits.go
+++ b/test/codegen/bits.go
@@ -1,5 +1,9 @@
 // asmcheck
 
+// Copyright 2018 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 codegen
 
 func bitcheck(a, b uint64) int {
diff --git a/test/codegen/rotate.go b/test/codegen/rotate.go
index f2b587d202..0c8a35b0c7 100644
--- a/test/codegen/rotate.go
+++ b/test/codegen/rotate.go
@@ -1,5 +1,9 @@
 // asmcheck
 
+// Copyright 2018 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 codegen
 
 import "math"