diff --git a/unittest/dawg_test.cc b/unittest/dawg_test.cc
index b8ee8fde..9d5ecee0 100644
--- a/unittest/dawg_test.cc
+++ b/unittest/dawg_test.cc
@@ -1,3 +1,13 @@
+// (C) Copyright 2017, Google Inc.
+// 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.
 
 #include <cstdlib>      // for system
 #include <fstream>      // for ifstream
diff --git a/unittest/layout_test.cc b/unittest/layout_test.cc
index 050a6254..b0ab886e 100644
--- a/unittest/layout_test.cc
+++ b/unittest/layout_test.cc
@@ -1,3 +1,13 @@
+// (C) Copyright 2017, Google Inc.
+// 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.
 
 #include <string>
 #include <utility>