diff --git a/addons/website_quote/controllers/main.py b/addons/website_quote/controllers/main.py
index eef797d613c..ae1adab0d4f 100644
--- a/addons/website_quote/controllers/main.py
+++ b/addons/website_quote/controllers/main.py
@@ -27,8 +27,7 @@ class sale_quote(http.Controller):
         if Order and request.session.get('view_quote') != now and request.env.user.share:
             request.session['view_quote'] = now
             body = _('Quotation viewed by customer')
-            _message_post_helper(res_model='sale.order', res_id=Order.id, message=body, token=token, token_field="access_token", message_type='notification', subtype="mail.mt_note", partner_ids=Order.user_id.partner_id.ids)
-
+            _message_post_helper(res_model='sale.order', res_id=Order.id, message=body, token=token, token_field="access_token", message_type='notification', subtype="mail.mt_note", partner_ids=Order.user_id.sudo().partner_id.ids)
         if not Order:
             return request.render('website.404')