diff --git a/ext/custom-addons/dp_custom/models/sale.py b/ext/custom-addons/dp_custom/models/sale.py
index cc12b979..98bfbfb4 100644
--- a/ext/custom-addons/dp_custom/models/sale.py
+++ b/ext/custom-addons/dp_custom/models/sale.py
@@ -514,6 +514,7 @@ class SaleOrderLine(models.Model):
                     if discount > 0:
                         vals.update({
                             'price_unit': -invoice_lines.price_subtotal * (discount / 100),
+                            'quantity': 1.0,
                             'uom_id': self.env.ref('product.product_uom_unit').id,
                             'name': 'Händlerrabatt {}%'.format(discount),
                             'hide_intrastat_code': True
diff --git a/ext/custom-addons/dp_sale_hide_discount/models/sale.py b/ext/custom-addons/dp_sale_hide_discount/models/sale.py
index 0146a9b3..f5a72d13 100644
--- a/ext/custom-addons/dp_sale_hide_discount/models/sale.py
+++ b/ext/custom-addons/dp_sale_hide_discount/models/sale.py
@@ -68,3 +68,11 @@ class SaleOrderLine(models.Model):
             line.price_reduce = float_round(line.price_unit * (1.0 - line.discount / 100.0),
                                             precision_digits=self.env['decimal.precision'].precision_get(
                                                 'Product Price'))
+
+    @api.multi
+    def _prepare_invoice_line(self, qty):
+        self.ensure_one()
+        res = super(SaleOrderLine, self)._prepare_invoice_line(qty)
+
+        res['hide_discount'] = self.hide_discount
+        return res