diff --git a/sf_manufacturing/models/mrp_workorder.py b/sf_manufacturing/models/mrp_workorder.py
index 15369f8d..3b5d4006 100644
--- a/sf_manufacturing/models/mrp_workorder.py
+++ b/sf_manufacturing/models/mrp_workorder.py
@@ -74,7 +74,7 @@ class ResMrpWorkOrder(models.Model):
     def _compute_pr_mp_count(self):
         for item in self:
             if not item.is_subcontract:
-                pr_mp_count = 0
+                item.pr_mp_count = 0
                 continue
             pr_ids = self.env['purchase.request'].sudo().search([('origin', 'like', item.name),('is_subcontract','=','True')])
             if pr_ids: