diff --git a/config/paths-debian.conf b/config/paths-debian.conf
index 4c27dac8..1ca4d242 100644
--- a/config/paths-debian.conf
+++ b/config/paths-debian.conf
@@ -11,7 +11,9 @@ after  = paths-overrides.local
 
 syslog_mail = /var/log/mail.log
 
-syslog_mail_warn = /var/log/mail.warn
+# control the `mail.warn` setting, see `/etc/rsyslog.d/50-default.conf` (if commented `mail.*` wins).
+# syslog_mail_warn = /var/log/mail.warn
+syslog_mail_warn = %(syslog_mail)s
 
 syslog_authpriv = /var/log/auth.log