diff --git a/addons/mail/res_users.py b/addons/mail/res_users.py
index e58e97a3fd8..160335fba2a 100644
--- a/addons/mail/res_users.py
+++ b/addons/mail/res_users.py
@@ -129,7 +129,7 @@ class res_users(osv.Model):
             This is done because when giving the context of Chatter on the
             various mailboxes, we do not have access to the current partner_id. """
         partner_id = self._message_post_get_pid(cr, uid, thread_id, context=context)
-        return self.pool.get('res.partner').message_post_user_api(cr, uid, partner_id, **kwargs)
+        return self.pool.get('res.partner').message_post_user_api(cr, uid, partner_id, context=context, **kwargs)
 
     def message_post(self, cr, uid, thread_id, context=None, **kwargs):
         """ Redirect the posting of message on res.users to the related partner.