diff --git a/addons/account/account.py b/addons/account/account.py
index 8d3fc03451d..f946723e350 100644
--- a/addons/account/account.py
+++ b/addons/account/account.py
@@ -21,6 +21,7 @@
 import time
 from datetime import datetime
 from dateutil.relativedelta import relativedelta
+from operator import itemgetter
 
 import netsvc
 import pooler