diff --git a/sale_down_payment/models/account_payment.py b/sale_down_payment/models/account_payment.py
index a10af15a..c7893899 100644
--- a/sale_down_payment/models/account_payment.py
+++ b/sale_down_payment/models/account_payment.py
@@ -49,7 +49,7 @@ def default_get(self, fields_list):
     def _compute_payment_amount(self, invoices=None, currency=None):
         amount = super(AccountAbstractPayment, self)._compute_payment_amount(
             invoices=invoices, currency=currency)
-        if self.sale_id:
+        if hasattr(self, 'sale_id') and self.sale_id:
             payment_currency = currency
             if not payment_currency:
                 payment_currency = self.sale_id.currency_id