diff --git a/addons/purchase_requisition_stock/models/purchase.py b/addons/purchase_requisition_stock/models/purchase.py
index 14b12534bf5..547eb4c6581 100644
--- a/addons/purchase_requisition_stock/models/purchase.py
+++ b/addons/purchase_requisition_stock/models/purchase.py
@@ -12,7 +12,7 @@ class PurchaseOrder(models.Model):
     @api.depends('on_time_rate')
     def _compute_on_time_rate_perc(self):
         for po in self:
-            if po.on_time_rate > 0:
+            if po.on_time_rate >= 0:
                 po.on_time_rate_perc = po.on_time_rate / 100
             else:
                 po.on_time_rate_perc = -1