diff --git a/sale_order_type/models/account_invoice.py b/sale_order_type/models/account_invoice.py
index 2e50e767d08e..8f7708cf29c3 100644
--- a/sale_order_type/models/account_invoice.py
+++ b/sale_order_type/models/account_invoice.py
@@ -24,7 +24,7 @@ def _onchange_partner_id(self):
     @api.onchange('sale_type_id')
     def onchange_sale_type_id(self):
         if self.sale_type_id.payment_term_id:
-            self.payment_term = self.sale_type_id.payment_term_id.id
+            self.payment_term_id = self.sale_type_id.payment_term_id.id
         if self.sale_type_id.journal_id:
             self.journal_id = self.sale_type_id.journal_id.id