diff --git a/addons/account/invoice.py b/addons/account/invoice.py
index 3ec87e737d3..9779c917413 100644
--- a/addons/account/invoice.py
+++ b/addons/account/invoice.py
@@ -35,7 +35,6 @@ import ir
 import pooler
 import mx.DateTime
 from mx.DateTime import RelativeDateTime
-
 from tools import config
 from tools.translate import _