diff --git a/tasks/main.yml b/tasks/main.yml
index da8bcdb..0d76d98 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -32,7 +32,7 @@
   register: dhcpd_register_nameservers
   changed_when: False
   when: dhcpd_mode == 'server'
-  check_mode: no
+  check_mode: False
 
 - name: Convert list of nameservers to Ansible list
   set_fact: