diff --git a/addons/sale/controllers/portal.py b/addons/sale/controllers/portal.py
index 03566515d24..259d218ed13 100644
--- a/addons/sale/controllers/portal.py
+++ b/addons/sale/controllers/portal.py
@@ -159,7 +159,7 @@ class CustomerPortal(CustomerPortal):
         if order_sudo and request.session.get('view_quote_%s' % order_sudo.id) != now and request.env.user.share and access_token:
             request.session['view_quote_%s' % order_sudo.id] = now
             body = _('Quotation viewed by customer %s') % order_sudo.partner_id.name
-            _message_post_helper('sale.order', order_sudo.id, body, token=order_sudo.access_token, message_type='notification', subtype="mail.mt_note", partner_ids=order_sudo.user_id.sudo().partner_id.ids)
+            _message_post_helper('sale.order', order_sudo.id, body, token=order_sudo.access_token, message_type='notification', subtype="mail.mt_note")
 
         values = {
             'sale_order': order_sudo,