diff --git a/roles/knot/tasks/config.yml b/roles/knot/tasks/config.yml
index cd5591b..b146213 100644
--- a/roles/knot/tasks/config.yml
+++ b/roles/knot/tasks/config.yml
@@ -19,7 +19,7 @@
     group: knot
     mode: 0640
     validate: /usr/bin/kzonecheck -v %s
-  when: "inventory_hostname in item.masters"
+  when: "inventory_hostname in item['masters']"
   loop: "{{ hostvars[inventory_hostname] | dict2items | selectattr('key', 'match', '^knot_zone_.+$') | map(attribute='value') | list }}"
   notify: reload knot