diff --git a/roles/opensmtpd/templates/smtpd.conf.j2 b/roles/opensmtpd/templates/smtpd.conf.j2
index 4cc66d1..22f136c 100644
--- a/roles/opensmtpd/templates/smtpd.conf.j2
+++ b/roles/opensmtpd/templates/smtpd.conf.j2
@@ -1,4 +1,4 @@
-{% if ansible_lo0 %}
+{% if ansible_lo0 is defined %}
 listen on lo0
 {% else %}
 listen on lo