diff --git a/addons/mail/models/mail_channel.py b/addons/mail/models/mail_channel.py
index f4e79cbf8eb..fefa20c53c1 100644
--- a/addons/mail/models/mail_channel.py
+++ b/addons/mail/models/mail_channel.py
@@ -240,10 +240,10 @@ class Channel(models.Model):
 
     @api.multi
     @api.returns('self', lambda value: value.id)
-    def message_post(self, body='', subject=None, message_type='notification', subtype=None, parent_id=False, attachments=None, content_subtype='html', **kwargs):
+    def message_post(self, **kwargs):
         # auto pin 'direct_message' channel partner
         self.filtered(lambda channel: channel.channel_type == 'chat').mapped('channel_last_seen_partner_ids').write({'is_pinned': True})
-        message = super(Channel, self.with_context(mail_create_nosubscribe=True)).message_post(body=body, subject=subject, message_type=message_type, subtype=subtype, parent_id=parent_id, attachments=attachments, content_subtype=content_subtype, **kwargs)
+        message = super(Channel, self.with_context(mail_create_nosubscribe=True)).message_post(**kwargs)
         return message
 
     def _alias_check_contact(self, message, message_dict, alias):
diff --git a/addons/rating/models/mail_thread.py b/addons/rating/models/mail_thread.py
index 89ba8badf89..66ca2139465 100644
--- a/addons/rating/models/mail_thread.py
+++ b/addons/rating/models/mail_thread.py
@@ -9,9 +9,9 @@ class MailThread(models.AbstractModel):
 
     @api.multi
     @api.returns('self', lambda value: value.id)
-    def message_post(self, body='', subject=None, message_type='notification', subtype=None, parent_id=False, attachments=None, content_subtype='html', **kwargs):
+    def message_post(self, **kwargs):
         rating_value = kwargs.get('rating_value')
-        message = super(MailThread, self).message_post(body=body, subject=subject, message_type=message_type, subtype=subtype, parent_id=parent_id, attachments=attachments, content_subtype=content_subtype, **kwargs)
+        message = super(MailThread, self).message_post(**kwargs)
         if rating_value:
             ir_model = self.env['ir.model'].sudo().search([('model', '=', self._name)])
             self.env['rating.rating'].create({
diff --git a/addons/website_forum/models/forum.py b/addons/website_forum/models/forum.py
index b9da18ffee3..93c3144bbd0 100644
--- a/addons/website_forum/models/forum.py
+++ b/addons/website_forum/models/forum.py
@@ -796,7 +796,7 @@ class Post(models.Model):
 
     @api.multi
     @api.returns('self', lambda value: value.id)
-    def message_post(self, message_type='notification', subtype=None, **kwargs):
+    def message_post(self, message_type='notification', **kwargs):
         question_followers = self.env['res.partner']
         if self.ids and message_type == 'comment':  # user comments have a restriction on karma
             # add followers of comments on the parent post
@@ -816,7 +816,7 @@ class Post(models.Model):
                 raise KarmaError('Not enough karma to comment')
             if not kwargs.get('record_name') and self.parent_id:
                 kwargs['record_name'] = self.parent_id.name
-        return super(Post, self).message_post(message_type=message_type, subtype=subtype, **kwargs)
+        return super(Post, self).message_post(message_type=message_type, **kwargs)
 
     @api.multi
     def message_get_message_notify_values(self, message, message_values):