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diff --git a/addons/product_expiry/models/stock_move_line.py b/addons/product_expiry/models/stock_move_line.py
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+++ b/addons/product_expiry/models/stock_move_line.py
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+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+import datetime
+
+from odoo import api, fields, models
+
+
+class StockMoveLine(models.Model):
+    _inherit = "stock.move.line"
+
+    expiration_date = fields.Datetime(string='Expiration Date',
+        help='This is the date on which the goods with this Serial Number may'
+        ' become dangerous and must not be consumed.')
+
+    @api.onchange('product_id', 'product_uom_id')
+    def _onchange_product_id(self):
+        res = super(StockMoveLine, self)._onchange_product_id()
+        if self.picking_type_use_create_lots:
+            if self.product_id.use_expiration_date:
+                self.expiration_date = fields.Datetime.today() + datetime.timedelta(days=self.product_id.expiration_time)
+            else:
+                self.expiration_date = False
+        return res
+
+    @api.onchange('lot_id')
+    def _onchange_lot_id(self):
+        if not self.picking_type_use_existing_lots or not self.product_id.use_expiration_date:
+            return
+        if self.lot_id:
+            self.expiration_date = self.lot_id.expiration_date
+        else:
+            self.expiration_date = False
+
+    def _assign_production_lot(self, lot):
+        super()._assign_production_lot(lot)
+        self.lot_id._update_date_values(self.expiration_date)