diff --git a/playbooks/00_install_zabbix_agent.yml b/playbooks/00_install_zabbix_agent.yml
index 516c202..d8d001c 100644
--- a/playbooks/00_install_zabbix_agent.yml
+++ b/playbooks/00_install_zabbix_agent.yml
@@ -121,7 +121,8 @@
         insertafter: '^# UserParameter='
         line: "UserParameter=system.certs,python3 /share/ZFS530_DATA/.qpkg/ZabbixAgent/cert_check2.py"
       become: "{{ 'no' if inventory_hostname in groups['nas'] else 'yes' }}"
-      when: inventory_hostname not in groups['nas']
+      when: inventory_hostname in groups['nas']
+
     - name: Reconfigure zabbix-agent2 config
       ansible.builtin.lineinfile:
         path: "{{ zabbix_agent_cfg }}"