diff --git a/models/pos_session.py b/models/pos_session.py
index f2f44df..a5c4404 100755
--- a/models/pos_session.py
+++ b/models/pos_session.py
@@ -134,6 +134,7 @@ class PosSession(models.Model):
                         session.currency_id.format(difference)
                     ))
                     session.write({'cash_register_balance_end_real': expected})
+                    session.invalidate_recordset(fnames=['cash_register_difference'])
 
             for order in session.order_ids:
                 for payment in order.payment_ids: