diff --git a/ext/custom-addons/dp_sale_delivery_date/models/sale_order.py b/ext/custom-addons/dp_sale_delivery_date/models/sale_order.py
index 8850a632..6e945b35 100644
--- a/ext/custom-addons/dp_sale_delivery_date/models/sale_order.py
+++ b/ext/custom-addons/dp_sale_delivery_date/models/sale_order.py
@@ -7,7 +7,7 @@ from odoo import api, fields, models
 class SaleOrder(models.Model):
     _inherit = 'sale.order'
 
-    delivery_date = fields.Date('Lieferdatum', compute='_compute_delivery_date', inverse='_inverse_delivery_date', index=True, track_visibility='onchange')
+    delivery_date = fields.Date('Lieferdatum', compute='_compute_delivery_date', inverse='_inverse_delivery_date', store=True, index=True, track_visibility='onchange')
 #    delivery_date = fields.Date('Lieferdatum', compute='_compute_delivery_date', inverse='_inverse_delivery_date')
 
     @api.multi