diff --git a/num2words/lang_AR.py b/num2words/lang_AR.py
index 56c5c4e..7c748b0 100644
--- a/num2words/lang_AR.py
+++ b/num2words/lang_AR.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 # Copyright (c) 2003, Taro Ogawa.  All Rights Reserved.
 # Copyright (c) 2013, Savoir-faire Linux inc.  All Rights Reserved.