diff --git a/addons/mail/security/ir.model.access.csv b/addons/mail/security/ir.model.access.csv
index 1979e2fec05..61106fbf234 100644
--- a/addons/mail/security/ir.model.access.csv
+++ b/addons/mail/security/ir.model.access.csv
@@ -7,3 +7,4 @@ access_mail_notification_all,mail.notification.all,model_mail_notification,,1,1,
 access_mail_group,mail.group,model_mail_group,base.group_user,1,1,1,1
 access_mail_alias_user,mail.alias,model_mail_alias,base.group_user,1,1,1,0
 access_mail_alias_system,mail.alias,model_mail_alias,base.group_system,1,1,1,1
+access_mail_message_subtype,mail.message.subtype,model_mail_message_subtype,,1,1,1,1
\ No newline at end of file