diff --git a/br_account_payment/models/account_payment.py b/br_account_payment/models/account_payment.py
index a8a75e1b5..da36a56fa 100644
--- a/br_account_payment/models/account_payment.py
+++ b/br_account_payment/models/account_payment.py
@@ -59,9 +59,3 @@ def action_view_receivable_payable(self):
         action['context'] = {'search_default_partner_id': self.partner_id.id}
 
         return action
-
-    @api.multi
-    def _compute_payment_amount(self, invoices=None, currency=None):
-        super(AccountPayment, self)._compute_payment_amount(
-            invoices=invoices, currency=currency)
-        return self.move_line_id.debit or self.move_line_id.credit