diff --git a/account_payment_order/models/account_payment.py b/account_payment_order/models/account_payment.py
index 5e3cfe38a..6b48725fc 100644
--- a/account_payment_order/models/account_payment.py
+++ b/account_payment_order/models/account_payment.py
@@ -47,6 +47,15 @@ class AccountPayment(models.Model):
         for item in self:
             item.payment_line_date = item.payment_line_ids[:1].date
 
+    @api.depends("payment_line_ids")
+    def _compute_partner_bank_id(self):
+        # Force the payment line bank account. The grouping function has already
+        # assured that there's no more than one bank account in the group
+        order_pays = self.filtered("payment_line_ids")
+        for pay in order_pays:
+            pay.partner_bank_id = pay.payment_line_ids.partner_bank_id
+        return super(AccountPayment, self - order_pays)._compute_partner_bank_id()
+
     @api.constrains("payment_method_line_id")
     def _check_payment_method_line_id(self):
         for pay in self:
diff --git a/account_payment_order/tests/test_payment_order_outbound.py b/account_payment_order/tests/test_payment_order_outbound.py
index f63d2654c..e068046f3 100644
--- a/account_payment_order/tests/test_payment_order_outbound.py
+++ b/account_payment_order/tests/test_payment_order_outbound.py
@@ -221,6 +221,7 @@ class TestPaymentOrderOutbound(TestPaymentOrderOutboundBase):
         order.payment_line_ids.partner_bank_id.action_unarchive()
         self.assertFalse(order.partner_banks_archive_msg)
         order.draft2open()
+        self.assertEqual(order.payment_ids[0].partner_bank_id, self.partner.bank_ids)
         order.open2generated()
         order.generated2uploaded()
         self.assertEqual(order.move_ids[0].date, order.payment_ids[0].date)