diff --git a/addons/sale/models/sale_order.py b/addons/sale/models/sale_order.py
index 464da51139a..2f7de9ec508 100644
--- a/addons/sale/models/sale_order.py
+++ b/addons/sale/models/sale_order.py
@@ -604,7 +604,7 @@ class SaleOrder(models.Model):
 
             order.amount_to_invoice = order.amount_total
             for invoice in order.invoice_ids.filtered(lambda x: x.state == 'posted'):
-                prices = sum(invoice.line_ids.filtered(lambda x: x.sale_line_ids.order_id.id == order.id).mapped('price_total'))
+                prices = sum(invoice.line_ids.filtered(lambda x: order in x.sale_line_ids.order_id).mapped('price_total'))
                 invoice_amount_currency = invoice.currency_id._convert(
                     prices * -invoice.direction_sign,
                     order.currency_id,
diff --git a/addons/sale/tests/test_sale_to_invoice.py b/addons/sale/tests/test_sale_to_invoice.py
index 5b5755ae46d..b1cf0b04ee2 100644
--- a/addons/sale/tests/test_sale_to_invoice.py
+++ b/addons/sale/tests/test_sale_to_invoice.py
@@ -989,3 +989,44 @@ class TestSaleToInvoice(TestSaleCommon):
 
         self.assertEqual(sale_order_1.amount_to_invoice, 0.0)
         self.assertEqual(sale_order_2.amount_to_invoice, 0.0)
+
+    def test_amount_to_invoice_one_line_multiple_so(self):
+        """ Testing creating two SOs linked to the same invoice line. Drawback: the substracted
+            amount to the amount_total will take both sale order into account.
+        """
+        sale_order_1 = self.env['sale.order'].create({
+            'partner_id': self.partner_a.id,
+            'order_line': [
+                Command.create({
+                    'product_id': self.company_data['product_delivery_no'].id,
+                    'product_uom_qty': 10,
+                }),
+            ],
+        })
+        sale_order_2 = self.env['sale.order'].create({
+            'partner_id': self.partner_a.id,
+            'order_line': [
+                Command.create({
+                    'product_id': self.company_data['product_delivery_no'].id,
+                    'product_uom_qty': 20,
+                }),
+            ],
+        })
+
+        sale_order_1.action_confirm()
+        sale_order_2.action_confirm()
+        sale_order_1.order_line.qty_delivered = 10
+        sale_order_2.order_line.qty_delivered = 20
+
+        self.env['sale.advance.payment.inv'].create({
+            'advance_payment_method': 'delivered',
+            'sale_order_ids': [Command.set((sale_order_2).ids)],
+        }).create_invoices()
+
+        sale_order_1.invoice_ids = sale_order_2.invoice_ids
+        sale_order_1.invoice_ids.line_ids.sale_line_ids += sale_order_1.order_line
+
+        sale_order_1.invoice_ids.action_post()
+
+        self.assertEqual(sale_order_1.amount_to_invoice, -700.0)
+        self.assertEqual(sale_order_2.amount_to_invoice, 0.0)