diff --git a/roles/nameserver/templates/unbound_network.conf.j2 b/roles/nameserver/templates/unbound_network.conf.j2
index 9ffcdc4..bb0a035 100644
--- a/roles/nameserver/templates/unbound_network.conf.j2
+++ b/roles/nameserver/templates/unbound_network.conf.j2
@@ -1,6 +1,6 @@
 server:
         ip-freebind: yes
-        {% if wg_local_ip %}
+        {% if wg_local_ip is defined %}
         interface: {{ wg_local_ip | ipaddr('address') }}
         {% else %}
         interface: {{ ansible_default_ipv4.address }}