diff --git a/models/account_payment_order.py b/models/account_payment_order.py
index d696758510cd622f5aa55ad7870c26245cfe5274..b4a6af41d38acaeaf8e86a68d874212a8fc833ab 100644
--- a/models/account_payment_order.py
+++ b/models/account_payment_order.py
@@ -75,4 +75,12 @@ class AccountPaymentOrder(models.Model):
             'views': [[tree_id, 'tree'], [False, 'form']],
             'search_view_id': [search_id, 'search'],
             'domain': [['payment_order_id', '=', self.id]],
-        }
\ No newline at end of file
+        }
+
+
+class AccountPaymentLine(models.Model):
+    _inherit = 'account.payment.line'
+
+    @api.multi
+    def draft2open_payment_line_check(self):
+        self.ensure_one()