diff --git a/util/codec/bytes.go b/util/codec/bytes.go
index 56be57ab11..11c8bdf12e 100644
--- a/util/codec/bytes.go
+++ b/util/codec/bytes.go
@@ -1,3 +1,20 @@
+// Copyright 2014 The Cockroach Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License. See the AUTHORS file
+// for names of contributors.
+//
+// Author: Tobias Schottdorf (tobias.schottdorf@gmail.com)
+
 // Copyright 2015 PingCAP, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/util/codec/number.go b/util/codec/number.go
index 9bab5b2a9a..615b66be07 100644
--- a/util/codec/number.go
+++ b/util/codec/number.go
@@ -1,3 +1,20 @@
+// Copyright 2014 The Cockroach Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied. See the License for the specific language governing
+// permissions and limitations under the License. See the AUTHORS file
+// for names of contributors.
+//
+// Author: Tobias Schottdorf (tobias.schottdorf@gmail.com)
+
 // Copyright 2015 PingCAP, Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");