diff --git a/addons/purchase/models/purchase.py b/addons/purchase/models/purchase.py
index 41c6b5ac35b..1dc8a09c23a 100644
--- a/addons/purchase/models/purchase.py
+++ b/addons/purchase/models/purchase.py
@@ -426,8 +426,8 @@ class PurchaseOrder(models.Model):
             # Do not set an invoice_id if we want to create a new bill.
             if not create_bill:
                 result['res_id'] = self.invoice_ids.id or False
-        result['context']['default_origin'] = self.name
-        result['context']['default_reference'] = self.partner_ref
+        result['context']['default_invoice_origin'] = self.name
+        result['context']['default_ref'] = self.partner_ref
         return result