diff --git a/stock_picking_return_lot/wizards/stock_return_picking_line.py b/stock_picking_return_lot/wizards/stock_return_picking_line.py
index a7ccbb10609a..6b70db14d103 100644
--- a/stock_picking_return_lot/wizards/stock_return_picking_line.py
+++ b/stock_picking_return_lot/wizards/stock_return_picking_line.py
@@ -1,4 +1,5 @@
 # Copyright 2024 ACSONE SA/NV
+# Copyright 2026 Tecnativa - Víctor Martínez
 # License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
 
 from odoo import api, fields, models
@@ -17,12 +18,20 @@ class StockReturnPickingLine(models.TransientModel):
         )
     ]
 
+    lot_id_domain = fields.Binary(compute="_compute_lot_id_domain")
     lot_id = fields.Many2one(
-        "stock.lot",
-        string="Lot/Serial Number",
-        domain="[('product_id', '=', product_id)]",
+        "stock.lot", string="Lot/Serial Number", domain="lot_id_domain"
     )
 
+    @api.depends("move_id")
+    def _compute_lot_id_domain(self):
+        for rec in self:
+            smls = rec.move_id.move_line_ids.filtered(
+                lambda x: x.state == "done" and x.lot_id
+            )
+            domain = [("id", "in", smls.lot_id.ids)]
+            rec.lot_id_domain = domain
+
     def _prepare_move_default_values(self, picking):
         # Set the wizard line lot as the move's restricted lot
         vals = super()._prepare_move_default_values(picking)