[copyright] added Contributors
diff --git a/patches/1311/p02_index_singles.py b/patches/1311/p02_index_singles.py
index a949680..ea67ad6 100644
--- a/patches/1311/p02_index_singles.py
+++ b/patches/1311/p02_index_singles.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2013, Web Notes Technologies Pvt. Ltd.
+# Copyright (c) 2013, Web Notes Technologies Pvt. Ltd. and Contributors
 # License: GNU General Public License v3. See license.txt
 from __future__ import unicode_literals