diff --git a/roles/knot/templates/etc/knot/knot.conf.j2 b/roles/knot/templates/etc/knot/knot.conf.j2
index 143a44d..49449e5 100644
--- a/roles/knot/templates/etc/knot/knot.conf.j2
+++ b/roles/knot/templates/etc/knot/knot.conf.j2
@@ -91,12 +91,7 @@ submission:
     check-interval: {{ knot_dnssec_submission_check_interval }}
     timeout: {{ knot_dnssec_submission_timeout }}
 {% if zone.parents is defined and zone.parents | length > 0 %}
-    parent:
-{% for parent in zone.parents | default([]) %}
-    - {{ parent }}
-{% endfor %}
-{% else %}
-    parent: []
+    parent:{% for parent in zone.parents %} {{ parent }}{% endfor %}
 {% endif %}
 {% endfor %}