diff --git a/files/defaults.Debian b/files/defaults.Debian
index 3d91884..0a75c0b 100644
--- a/files/defaults.Debian
+++ b/files/defaults.Debian
@@ -3,9 +3,10 @@
 # Path to dhcpd's config file (default: /etc/dhcp/dhcpd.conf).
 DHCPD_CONF=/etc/dhcp/dhcpd.conf
 
+
 # Path to dhcpd's PID file (default: /var/run/dhcpd.pid).
 #DHCPD_PID=/var/run/dhcpd.pid
 
 # On what interfaces should the DHCP server (dhcpd) serve DHCP requests?
 # Separate multiple interfaces with spaces, e.g. "eth0 eth1".
-INTERFACES="{{ server.interfaces|join(' ') }}"
\ No newline at end of file
+INTERFACES="{% for interface in server.interfaces %}{{ interface.name }}{% if not loop.last %} {% endif %}{% endfor %}"
\ No newline at end of file
diff --git a/files/defaults.RedHat b/files/defaults.RedHat
index f3712e0..0e97b7a 100644
--- a/files/defaults.RedHat
+++ b/files/defaults.RedHat
@@ -1,4 +1,4 @@
 {%- from "isc_dhcp/map.jinja" import server with context %}
 
 # Command line options here
-DHCPDARGS=" {{ server.interfaces|join(' ') }}"
\ No newline at end of file
+DHCPDARGS=" {% for interface in server.interfaces %}{{ interface.name }}{% if not loop.last %} {% endif %}{% endfor %}"
\ No newline at end of file