diff --git a/addons/website_slides/models/slide_channel.py b/addons/website_slides/models/slide_channel.py
index 8a2bac24b5d..34b5bc0fcd9 100644
--- a/addons/website_slides/models/slide_channel.py
+++ b/addons/website_slides/models/slide_channel.py
@@ -567,6 +567,7 @@ class Channel(models.Model):
                 [('partner_id', 'in', partner_ids),
                  ('channel_id', '=', channel.id)]
             ])
+        self.message_unsubscribe(partner_ids=partner_ids)
 
         if removed_channel_partner_domain:
             self.env['slide.channel.partner'].sudo().search(removed_channel_partner_domain).unlink()