diff --git a/addons/purchase/models/purchase.py b/addons/purchase/models/purchase.py
index 07ccc261d5a..dc8fdb862b9 100644
--- a/addons/purchase/models/purchase.py
+++ b/addons/purchase/models/purchase.py
@@ -1012,7 +1012,7 @@ class ProcurementRule(models.Model):
     def _prepare_purchase_order(self, product_id, product_qty, product_uom, origin, values, partner):
         schedule_date = self._get_purchase_schedule_date(values)
         purchase_date = self._get_purchase_order_date(product_id, product_qty, product_uom, values, partner, schedule_date)
-        fpos = self.env['account.fiscal.position'].with_context(company_id=values['company_id'].id).get_fiscal_position(partner.id)
+        fpos = self.env['account.fiscal.position'].with_context(force_company=values['company_id'].id).get_fiscal_position(partner.id)
 
         gpo = self.group_propagation_option
         group = (gpo == 'fixed' and self.group_id.id) or \