diff --git a/addons/mrp_subcontracting/models/mrp_production.py b/addons/mrp_subcontracting/models/mrp_production.py
index b5bef8c1366..39c7e38829c 100644
--- a/addons/mrp_subcontracting/models/mrp_production.py
+++ b/addons/mrp_subcontracting/models/mrp_production.py
@@ -45,7 +45,7 @@ class MrpProduction(models.Model):
             raise UserError(_('You must enter a serial number for %s') % self.product_id.name)
         for sml in self.move_raw_ids.move_line_ids:
             if sml.tracking != 'none' and not sml.lot_id:
-                raise UserError(_('You must enter a serial number for each line of %s') % sml.product_id.name)
+                raise UserError(_('You must enter a serial number for each line of %s') % sml.product_id.display_name)
         consumption_issues = self._get_consumption_issues()
         if consumption_issues:
             return self._action_generate_consumption_wizard(consumption_issues)