diff --git a/oauth2client/file.py b/oauth2client/file.py
index b72e3c5..da666c4 100644
--- a/oauth2client/file.py
+++ b/oauth2client/file.py
@@ -1,4 +1,16 @@
-# Copyright 2010 Google Inc. All Rights Reserved.
+# Copyright (C) 2010 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.
 
 """Utilities for OAuth.