diff --git a/addons/portal/wizard/portal_wizard.py b/addons/portal/wizard/portal_wizard.py
index 0c8206c86f6..50c623a19e2 100644
--- a/addons/portal/wizard/portal_wizard.py
+++ b/addons/portal/wizard/portal_wizard.py
@@ -140,7 +140,7 @@ class PortalWizardUser(models.TransientModel):
                     if wizard_user.partner_id.company_id:
                         company_id = wizard_user.partner_id.company_id.id
                     else:
-                        company_id = self.env['res.company']._company_default_get('res.users')
+                        company_id = self.env['res.company']._company_default_get('res.users').id
                     user_portal = wizard_user.sudo().with_context(company_id=company_id)._create_user()
                 else:
                     user_portal = user