diff --git a/addons/mail/mail_thread.py b/addons/mail/mail_thread.py
index c5ec4c2b17a..e986f12b822 100644
--- a/addons/mail/mail_thread.py
+++ b/addons/mail/mail_thread.py
@@ -707,13 +707,12 @@ class mail_thread(osv.AbstractModel):
 
         return mail_message.create(cr, uid, values, context=context)
 
-    def message_post_api(self, cr, uid, thread_id, body='', subject=False, type='notification',
-                        parent_id=False, attachment_ids=None, context=None):
+    def message_post_api(self, cr, uid, thread_id, body='', subject=False, parent_id=False, attachment_ids=None, context=None):
         """ Wrapper on message_post, used only in Chatter (JS). The purpose is
             to handle attachments.
             # TDE FIXME: body is plaintext: convert it into html
         """
-        new_message_id = self.message_post(cr, uid, thread_id=thread_id, body=body, subject=subject, type=type,
+        new_message_id = self.message_post(cr, uid, thread_id=thread_id, body=body, subject=subject, type='comment',
                         subtype='mail.mt_comment', parent_id=parent_id, context=context)
 
         # HACK FIXME: Chatter: attachments linked to the document (not done JS-side), load the message
diff --git a/addons/mail/res_users.py b/addons/mail/res_users.py
index 4ef2dda6d9c..1b6388111ba 100644
--- a/addons/mail/res_users.py
+++ b/addons/mail/res_users.py
@@ -111,8 +111,7 @@ class res_users(osv.Model):
         alias_pool.unlink(cr, uid, alias_ids, context=context)
         return res
 
-    def message_post_api(self, cr, uid, thread_id, body='', subject=False, type='notification',
-                        parent_id=False, attachment_ids=None, context=None, **kwargs):
+    def message_post_api(self, cr, uid, thread_id, body='', subject=False, parent_id=False, attachment_ids=None, context=None):
         """ Redirect the posting of message on res.users to the related partner.
             This is done because when giving the context of Chatter on the
             various mailboxes, we do not have access to the current partner_id.
@@ -124,7 +123,7 @@ class res_users(osv.Model):
             thread_id = thread_id[0]
         partner_id = self.pool.get('res.users').read(cr, uid, thread_id, ['partner_id'], context=context)['partner_id'][0]
         return self.pool.get('res.partner').message_post_api(cr, uid, partner_id, body=body, subject=subject,
-            type=type, parent_id=parent_id, attachment_ids=attachment_ids, context=context, **kwargs)
+            parent_id=parent_id, attachment_ids=attachment_ids, context=context)
 
     def message_post(self, cr, uid, thread_id, context=None, **kwargs):
         """ Redirect the posting of message on res.users to the related partner.
diff --git a/addons/mail/static/src/js/mail.js b/addons/mail/static/src/js/mail.js
index 6a409782117..0b6a8ec86d2 100644
--- a/addons/mail/static/src/js/mail.js
+++ b/addons/mail/static/src/js/mail.js
@@ -358,7 +358,6 @@ openerp.mail = function (session) {
                         this.context.default_res_id, 
                         mail.ChatterUtils.get_text2html(body), 
                         false, 
-                        'comment', 
                         this.context.default_parent_id, 
                         attachments,
                         this.parent_thread.context