diff --git a/salt/dhcp/dhcpd.conf b/salt/dhcp/dhcpd.conf
index 3614885..e19731a 100644
--- a/salt/dhcp/dhcpd.conf
+++ b/salt/dhcp/dhcpd.conf
@@ -8,7 +8,7 @@ subnet {{ subnet.split('/')[0] }} netmask {{ netmasks[subnet.split('/')[1]] }} {
     authoritative;
     default-lease-time {{ conf['time'] }};
     max-lease-time {{ conf['max-time'] }};
-    {%- if iface in ['pub'] %}
+    {%- if conf.get('lower-max-time') and conf.get('time') %}
       min-lease-time {{ conf['time'] }};
       adaptive-lease-time-threshold {{ conf['lower-max-time'] }};
     {%- endif %}