diff --git a/sf_manufacturing/models/mrp_production.py b/sf_manufacturing/models/mrp_production.py
index b956e902..55076fc6 100644
--- a/sf_manufacturing/models/mrp_production.py
+++ b/sf_manufacturing/models/mrp_production.py
@@ -40,7 +40,7 @@ class MrpProduction(models.Model):
             sale_order_id = production.procurement_group_id.mrp_production_ids.move_dest_ids.group_id.sale_id
             if not sale_order_id:
                 continue
-            sale_id = self.env['sale.order'].sudo().browse(sale_order_id)
+            sale_id = self.env['sale.order'].sudo().browse(int(sale_order_id))
             if sale_id:
                 production.deadline_of_delivery = sale_id.deadline_of_delivery