diff --git a/addons/im_livechat/models/mail_channel.py b/addons/im_livechat/models/mail_channel.py
index 4572ba64848..982c4751701 100644
--- a/addons/im_livechat/models/mail_channel.py
+++ b/addons/im_livechat/models/mail_channel.py
@@ -36,6 +36,13 @@ class MailChannel(models.Model):
     channel_type = fields.Selection(selection_add=[('livechat', 'Livechat Conversation')])
     livechat_channel_id = fields.Many2one('im_livechat.channel', 'Channel')
 
+    @api.multi
+    def _compute_is_chat(self):
+        super(MailChannel, self)._compute_is_chat()
+        for record in self:
+            if record.channel_type == 'livechat':
+                record.is_chat = True
+
     @api.multi
     def _channel_message_notifications(self, message):
         """ When a anonymous user create a mail.channel, the operator is not notify (to avoid massive polling when
diff --git a/addons/mail/models/mail_channel.py b/addons/mail/models/mail_channel.py
index 13cbb4644a1..b1772eb047e 100644
--- a/addons/mail/models/mail_channel.py
+++ b/addons/mail/models/mail_channel.py
@@ -78,6 +78,7 @@ class Channel(models.Model):
         ('chat', 'Chat Discussion'),
         ('channel', 'Channel')],
         'Channel Type', default='channel')
+    is_chat = fields.Boolean(string='Is a chat', compute='_compute_is_chat', default=False)
     description = fields.Text('Description')
     uuid = fields.Char('UUID', size=50, index=True, default=lambda self: str(uuid4()), copy=False)
     email_send = fields.Boolean('Send messages by email', default=False)
@@ -178,6 +179,12 @@ class Channel(models.Model):
         for record in self:
             record.is_member = record in membership_ids
 
+    @api.multi
+    def _compute_is_chat(self):
+        for record in self:
+            if record.channel_type == 'chat':
+                record.is_chat = True
+
     @api.onchange('public')
     def _onchange_public(self):
         if self.public == 'public':
@@ -384,7 +391,7 @@ class Channel(models.Model):
         if moderation_status == 'rejected':
             return self.env['mail.message']
 
-        self.filtered(lambda channel: channel.channel_type == 'chat').mapped('channel_last_seen_partner_ids').write({'is_pinned': True})
+        self.filtered(lambda channel: channel.is_chat).mapped('channel_last_seen_partner_ids').write({'is_pinned': True})
 
         message = super(Channel, self.with_context(mail_create_nosubscribe=True)).message_post(message_type=message_type, moderation_status=moderation_status, **kwargs)