diff --git a/product/ERP5/Document/Supply.py b/product/ERP5/Document/Supply.py
index c1ac69b336f98e7bdff932d37a4514b9547d7808..5f20d8b425af6e3b4c190c9307ddd4b93d833dde 100644
--- a/product/ERP5/Document/Supply.py
+++ b/product/ERP5/Document/Supply.py
@@ -1,5 +1,5 @@
 ##############################################################################
-#
+# -*- coding: utf8 -*-
 # Copyright (c) 2002-2009 Nexedi SARL and Contributors. All Rights Reserved.
 #                    Jean-Paul Smets-Solanes <jp@nexedi.com>
 #                    Łukasz Nowak <luke@nexedi.com>