diff --git a/addons/mail/models/mail_thread.py b/addons/mail/models/mail_thread.py
index 5e606a5c473..97313b06cc8 100644
--- a/addons/mail/models/mail_thread.py
+++ b/addons/mail/models/mail_thread.py
@@ -1792,7 +1792,7 @@ class MailThread(models.AbstractModel):
         if subtype_xmlid:
             subtype_id = self.env['ir.model.data'].xmlid_to_res_id(subtype_xmlid)
         if not subtype_id:
-            subtype_id = self.env['ir.model.data'].xmlid_to_res_id('mail_mt_note')
+            subtype_id = self.env['ir.model.data'].xmlid_to_res_id('mail.mt_note')
 
         # automatically subscribe recipients if asked to
         if self._context.get('mail_post_autofollow') and partner_ids:
diff --git a/addons/test_mail/tests/test_performance.py b/addons/test_mail/tests/test_performance.py
index ff4749c98ee..0edd404c16d 100644
--- a/addons/test_mail/tests/test_performance.py
+++ b/addons/test_mail/tests/test_performance.py
@@ -932,7 +932,7 @@ class TestMailHeavyPerformancePost(BaseMailPerformance):
         ]
         self.attachements = self.env['ir.attachment'].with_user(self.env.user).create(self.vals)
         attachement_ids = self.attachements.ids
-        with self.assertQueryCount(emp=65):
+        with self.assertQueryCount(emp=66):
             self.cr.sql_log = self.warm and self.cr.sql_log_count
             record.with_context({}).message_post(
                 body='<p>Test body <img src="cid:cid1"> <img src="cid:cid2"></p>',