diff --git a/addons/sale/models/sale.py b/addons/sale/models/sale.py
index 7a3861585dc..8fba994d6ba 100644
--- a/addons/sale/models/sale.py
+++ b/addons/sale/models/sale.py
@@ -39,7 +39,7 @@ class SaleOrder(models.Model):
                 'amount_total': amount_untaxed + amount_tax,
             })
 
-    @api.depends('state', 'order_line.invoice_status')
+    @api.depends('state', 'order_line.invoice_status', 'order_line.invoice_lines')
     def _get_invoiced(self):
         """
         Compute the invoice status of a SO. Possible statuses: