diff --git a/addons/website_sale/models/sale_order.py b/addons/website_sale/models/sale_order.py
index f7de11fe485..6fb01886d20 100644
--- a/addons/website_sale/models/sale_order.py
+++ b/addons/website_sale/models/sale_order.py
@@ -54,7 +54,7 @@ class SaleOrder(models.Model):
         abandoned_delay = float(self.env['ir.config_parameter'].sudo().get_param('website_sale.cart_abandoned_delay', '1.0'))
         abandoned_datetime = fields.Datetime.to_string(datetime.utcnow() - relativedelta(hours=abandoned_delay))
         for order in self:
-            domain = order.date_order <= abandoned_datetime and order.team_id.team_type == 'website' and order.state == 'draft' and order.partner_id.id != self.env.ref('base.public_partner').id and order.order_line
+            domain = order.date_order and order.date_order <= abandoned_datetime and order.team_id.team_type == 'website' and order.state == 'draft' and order.partner_id.id != self.env.ref('base.public_partner').id and order.order_line
             order.is_abandoned_cart = bool(domain)
 
     def _search_abandoned_cart(self, operator, value):