diff --git a/mrproto/__init__.py b/mrproto/__init__.py
new file mode 100644
index 0000000..68130d5
--- /dev/null
+++ b/mrproto/__init__.py
@@ -0,0 +1,3 @@
+# Copyright 2016 The Chromium Authors
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.