diff --git a/addons/point_of_sale/models/pos_order.py b/addons/point_of_sale/models/pos_order.py
index 5cc05a98ca66c..a7aa25547ef8e 100644
--- a/addons/point_of_sale/models/pos_order.py
+++ b/addons/point_of_sale/models/pos_order.py
@@ -1632,7 +1632,7 @@ def _launch_stock_rule_from_pos_order_lines(self):
                 line.order_id.with_context(backend_recomputation=True).write({'procurement_group_id': group_id})
 
             values = line._prepare_procurement_values(group_id=group_id)
-            product_qty = line.qty
+            product_qty = line.product_uom_id._compute_quantity(line.qty, line.product_id.uom_id)
 
             procurement_uom = line.product_id.uom_id
             procurements.append(self.env['procurement.group'].Procurement(