diff --git a/addons/sale/models/sale_order_line.py b/addons/sale/models/sale_order_line.py
index 542888239e2..4297f9cb23d 100644
--- a/addons/sale/models/sale_order_line.py
+++ b/addons/sale/models/sale_order_line.py
@@ -760,6 +760,7 @@ class SaleOrderLine(models.Model):
             elif not float_is_zero(line.qty_to_invoice, precision_digits=precision):
                 line.invoice_status = 'to invoice'
             elif line.state == 'sale' and line.product_id.invoice_policy == 'order' and\
+                    line.product_uom_qty >= 0.0 and\
                     float_compare(line.qty_delivered, line.product_uom_qty, precision_digits=precision) == 1:
                 line.invoice_status = 'upselling'
             elif float_compare(line.qty_invoiced, line.product_uom_qty, precision_digits=precision) >= 0:
diff --git a/addons/sale/tests/test_sale_order.py b/addons/sale/tests/test_sale_order.py
index 497567e8dba..99bb987f9c3 100644
--- a/addons/sale/tests/test_sale_order.py
+++ b/addons/sale/tests/test_sale_order.py
@@ -108,6 +108,20 @@ class TestSaleOrder(SaleCommon):
         self.assertEqual(mail_message.author_id, mail_message.partner_ids, 'Sale: author should be in composer recipients thanks to "partner_to" field set on template')
         self.assertEqual(mail_message.partner_ids, mail_message.sudo().mail_ids.recipient_ids, 'Sale: author should receive mail due to presence in composer recipients')
 
+    def test_invoice_state_when_ordered_quantity_is_negative(self):
+        """When you invoice a SO line with a product that is invoiced on ordered quantities and has negative ordered quantity,
+        this test ensures that the  invoicing status of the SO line is 'invoiced' (and not 'upselling')."""
+        sale_order = self.env['sale.order'].create({
+            'partner_id': self.partner.id,
+            'order_line': [(0, 0, {
+                'product_id': self.product.id,
+                'product_uom_qty': -1,
+            })]
+        })
+        sale_order.action_confirm()
+        sale_order._create_invoices(final=True)
+        self.assertTrue(sale_order.invoice_status == 'invoiced', 'Sale: The invoicing status of the SO should be "invoiced"')
+
     def test_sale_sequence(self):
         self.env['ir.sequence'].search([
             ('code', '=', 'sale.order'),