diff --git a/ext/custom-addons/dp_custom/models/sale.py b/ext/custom-addons/dp_custom/models/sale.py
index bb02f153..1e139348 100644
--- a/ext/custom-addons/dp_custom/models/sale.py
+++ b/ext/custom-addons/dp_custom/models/sale.py
@@ -389,9 +389,13 @@ class SaleOrder(models.Model):
 class SaleOrderLine(models.Model):
     _inherit = 'sale.order.line'
 
+    @api.model
+    def _get_product_id_domain(self):
+        return [('sale_ok', '=', True), '|', ('can_be_sold_unconfigured', '=', True), ('type', '=', 'service')]
+
     lot_id = fields.Many2one(comodel_name='stock.production.lot', string='Lot')
     from_designbox = fields.Boolean(string='I', readonly=True, help='Import von externem System')
-    product_id = fields.Many2one(domain=[('sale_ok', '=', True), ('can_be_sold_unconfigured', '=', True)])
+    product_id = fields.Many2one(domain=_get_product_id_domain)
     weight = fields.Float(string='Gewicht', compute='_compute_weight')
     intrastat_id = fields.Many2one(comodel_name='report.intrastat.code', string='Intrastat Code')