diff --git a/pos_orderline_absolute_discount/models/pos_order_model.py b/pos_orderline_absolute_discount/models/pos_order_model.py
index 07e07d034a..ae7494417b 100644
--- a/pos_orderline_absolute_discount/models/pos_order_model.py
+++ b/pos_orderline_absolute_discount/models/pos_order_model.py
@@ -45,7 +45,7 @@ class PosOrderLine(models.Model):
         "price_unit", "tax_ids", "qty", "discount", "product_id", "absolute_discount"
     )
     def _compute_amount_line_all(self):
-        super(PosOrderLine, self)._compute_amount_line_all()
+        res = super(PosOrderLine, self)._compute_amount_line_all()
         for line in self:
             fpos = line.order_id.fiscal_position_id
             tax_ids_after_fiscal_position = (
@@ -62,12 +62,13 @@ def _compute_amount_line_all(self):
                     product=line.product_id,
                     partner=line.order_id.partner_id,
                 )
-                line.update(
+                res.update(
                     {
                         "price_subtotal_incl": taxes["total_included"],
                         "price_subtotal": taxes["total_excluded"],
                     }
                 )
+        return res
 
     @api.onchange("qty", "discount", "price_unit", "tax_ids", "absolute_discount")
     def _onchange_qty(self):