diff --git a/pms/models/pms_reservation.py b/pms/models/pms_reservation.py
index d33a7d4103..518f619e47 100644
--- a/pms/models/pms_reservation.py
+++ b/pms/models/pms_reservation.py
@@ -2321,7 +2321,9 @@ def autocheckout(self, reservation):
         ):
             msg = _("No checkin was made for this reservation")
             reservation.message_post(
-                subject=_("No Checkins!"), subtype="mt_comment", body=msg
+                subject=_("No Checkins!"),
+                subtype_xmlid="mail.mt_comment",
+                body=msg,
             )
         return True