diff --git a/addons/purchase/purchase.py b/addons/purchase/purchase.py
index f7edbb994b2..1f6d7e2bfed 100644
--- a/addons/purchase/purchase.py
+++ b/addons/purchase/purchase.py
@@ -609,7 +609,7 @@ class PurchaseOrderLine(models.Model):
             diff_quantity = line.product_qty
             for procurement in line.procurement_ids:
                 procurement_qty = procurement.product_uom._compute_qty_obj(procurement.product_uom, procurement.product_qty, line.product_uom)
-                if float_compare(diff_quantity, 0.0, precision_rounding=line.product_uom.rounding) > 0:
+                if float_compare(procurement_qty, 0.0, precision_rounding=procurement.product_uom.rounding) > 0 and float_compare(diff_quantity, 0.0, precision_rounding=line.product_uom.rounding) > 0:
                     tmp = template.copy()
                     tmp.update({
                         'product_uom_qty': min(procurement_qty, diff_quantity),