diff --git a/addons/calendar/models/mail_activity.py b/addons/calendar/models/mail_activity.py
index badc4e3f3d8..14a72164363 100644
--- a/addons/calendar/models/mail_activity.py
+++ b/addons/calendar/models/mail_activity.py
@@ -2,7 +2,7 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
 from odoo import api, models, fields, tools, _
-
+from odoo.tools import is_html_empty
 
 class MailActivityType(models.Model):
     _inherit = "mail.activity.type"
@@ -23,7 +23,7 @@ class MailActivity(models.Model):
             'default_res_id': self.env.context.get('default_res_id'),
             'default_res_model': self.env.context.get('default_res_model'),
             'default_name': self.summary or self.res_name,
-            'default_description': self.note and tools.html2plaintext(self.note).strip() or '',
+            'default_description': self.note if not is_html_empty(self.note) else '',
             'default_activity_ids': [(6, 0, self.ids)],
         }
         return action