diff --git a/addons/account/wizard/account_invoice_send.py b/addons/account/wizard/account_invoice_send.py
index ce4dab563178041ce67a17e5a36625e389f4d9cf..d4bd9417bc2ea63fd16636eae0dc79587c9e31ac 100644
--- a/addons/account/wizard/account_invoice_send.py
+++ b/addons/account/wizard/account_invoice_send.py
@@ -75,7 +75,7 @@ class AccountInvoiceSend(models.TransientModel):
                 if invoices:
                     wizard.invoice_without_email = "%s\n%s" % (
                         _("The following invoice(s) will not be sent by email, because the customers don't have email address."),
-                        "\n".join([i.reference for i in invoices])
+                        "\n".join([i.name for i in invoices])
                         )
                 else:
                     wizard.invoice_without_email = False