diff --git a/templates/prep-scripts/debian_prep.sh.j2 b/templates/prep-scripts/debian_prep.sh.j2
index c8a52506..655d44a0 100644
--- a/templates/prep-scripts/debian_prep.sh.j2
+++ b/templates/prep-scripts/debian_prep.sh.j2
@@ -52,6 +52,6 @@ update-locale LANG={{ locale }}
 # Set the IP of the lxcbr0 interface as the DNS server
 mkdir -p /etc/systemd/resolved.conf.d
 echo "[Resolve]" > /etc/systemd/resolved.conf.d/openstack-ansible.conf
-echo "{{ lxc_net_address }}" >> /etc/systemd/resolved.conf.d/openstack-ansible.conf
+echo "DNS={{ lxc_net_address }}" >> /etc/systemd/resolved.conf.d/openstack-ansible.conf
 systemctl enable systemd-networkd
 {{ lxc_cache_prep_post_commands }}