diff --git a/addons/stock/stock.py b/addons/stock/stock.py
index cf3026494aa..6873508023f 100644
--- a/addons/stock/stock.py
+++ b/addons/stock/stock.py
@@ -20,15 +20,13 @@
 
 from datetime import datetime
 from dateutil.relativedelta import relativedelta
+import time
 
 from osv import fields, osv
 from tools import config
 from tools.translate import _
-import math
 import netsvc
-import time
 import tools
-
 import decimal_precision as dp