diff --git a/built_json_generator/lib/src/library_elements.dart b/built_json_generator/lib/src/library_elements.dart
index d330007..4d29570 100644
--- a/built_json_generator/lib/src/library_elements.dart
+++ b/built_json_generator/lib/src/library_elements.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2015, Google Inc. Please see the AUTHORS file for details.
+// All rights reserved. Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 library built_json_generator.library_elements;
 
 import 'package:analyzer/src/generated/element.dart';
diff --git a/built_json_generator/lib/src/source_class.dart b/built_json_generator/lib/src/source_class.dart
index 0e5d816..0fd10b2 100644
--- a/built_json_generator/lib/src/source_class.dart
+++ b/built_json_generator/lib/src/source_class.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2015, Google Inc. Please see the AUTHORS file for details.
+// All rights reserved. Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 library built_json_generator.source_class;
 
 import 'package:analyzer/src/generated/element.dart';
diff --git a/built_json_generator/lib/src/source_field.dart b/built_json_generator/lib/src/source_field.dart
index 966381a..312c600 100644
--- a/built_json_generator/lib/src/source_field.dart
+++ b/built_json_generator/lib/src/source_field.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2015, Google Inc. Please see the AUTHORS file for details.
+// All rights reserved. Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 library built_json_generator.source_field;
 
 import 'package:analyzer/src/generated/element.dart';
diff --git a/built_json_generator/lib/src/source_library.dart b/built_json_generator/lib/src/source_library.dart
index 5a219bf..82e24be 100644
--- a/built_json_generator/lib/src/source_library.dart
+++ b/built_json_generator/lib/src/source_library.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2015, Google Inc. Please see the AUTHORS file for details.
+// All rights reserved. Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 library built_json_generator.source_library;
 
 import 'package:analyzer/src/generated/element.dart';