diff --git a/account_advanced_reconcile/base_advanced_reconciliation.py b/account_advanced_reconcile/base_advanced_reconciliation.py
index ebb048f7..4de33f09 100644
--- a/account_advanced_reconcile/base_advanced_reconciliation.py
+++ b/account_advanced_reconcile/base_advanced_reconciliation.py
@@ -22,7 +22,7 @@
 from itertools import groupby, product
 from operator import itemgetter
 from openerp.osv.orm import Model, AbstractModel, TransientModel
-from openerp.osv import fields
+from openerp.osv import fields, osv
 
 
 class easy_reconcile_advanced(AbstractModel):
diff --git a/account_easy_reconcile/base_reconciliation.py b/account_easy_reconcile/base_reconciliation.py
index c1f4041c..b1134c55 100644
--- a/account_easy_reconcile/base_reconciliation.py
+++ b/account_easy_reconcile/base_reconciliation.py
@@ -20,7 +20,7 @@
 ##############################################################################
 
 from openerp.osv.orm import AbstractModel
-from openerp.osv import fields
+from openerp.osv import fields, osv
 from operator import itemgetter, attrgetter
 
 
diff --git a/account_easy_reconcile/easy_reconcile.py b/account_easy_reconcile/easy_reconcile.py
index e093f8d8..1577f8dc 100644
--- a/account_easy_reconcile/easy_reconcile.py
+++ b/account_easy_reconcile/easy_reconcile.py
@@ -21,7 +21,7 @@
 
 import time
 from openerp.osv.orm import Model, AbstractModel
-from openerp.osv import fields
+from openerp.osv import fields, osv
 from openerp.tools.translate import _
 from openerp.tools import DEFAULT_SERVER_DATETIME_FORMAT