diff --git a/l10n_it_fatturapa_out_dn/wizard/wizard_export_fatturapa.py b/l10n_it_fatturapa_out_dn/wizard/wizard_export_fatturapa.py
index 6fc94f607e0c..e7cc4fa569d2 100644
--- a/l10n_it_fatturapa_out_dn/wizard/wizard_export_fatturapa.py
+++ b/l10n_it_fatturapa_out_dn/wizard/wizard_export_fatturapa.py
@@ -13,7 +13,7 @@ def default_get(self, fields):
         invoice_ids = self.env.context.get("active_ids", False)
         invoices = self.env["account.move"].browse(invoice_ids)
         # enable option by default if any invoice is connected to a dn
-        if any(invoices.invoices_line_ids.mapped("delivery_note_id")):
+        if any(invoices.invoice_line_ids.mapped("delivery_note_id")):
             res["include_transport_data"] = "dati_dn"
         return res