diff --git a/postfix/nullclient/etc/postfix/master.cf b/postfix/nullclient/etc/postfix/master.cf
index 4d150853b98121edd54f7f7db79205bcaf9c2482..4d103d61a7372b4a8bd71f44b4daed7b55c4a273 100644
--- a/postfix/nullclient/etc/postfix/master.cf
+++ b/postfix/nullclient/etc/postfix/master.cf
@@ -73,7 +73,10 @@ virtual   unix  -       n       n       -       -       virtual
 lmtp      unix  -       -       y       -       -       lmtp
 anvil     unix  -       -       y       -       1       anvil
 scache    unix  -       -       y       -       1       scache
+{# This is not supported by older postfix versions #}
+{% if grains['oscodename'] == 'buster' %}
 postlog   unix-dgram n  -       n       -       1       postlogd
+{% endif %}
 #
 # ====================================================================
 # Interfaces to non-Postfix software. Be sure to examine the manual