diff --git a/roles/nagios_server/tasks/main.yml b/roles/nagios_server/tasks/main.yml
index 847be7315f..c9bf2435df 100644
--- a/roles/nagios_server/tasks/main.yml
+++ b/roles/nagios_server/tasks/main.yml
@@ -1,5 +1,5 @@
 - name: Add nagios group as 420
-  groups: name=nagios gid=420 state=present system=yes
+  group: name=nagios gid=420 state=present system=yes
 
 - name: Add nagios user as 420
   user: name=nagios uid=420 state=present home=/var/spool/nagios comment="Nagios Monitoring User" createhome=yes system=yes shell=/bin/bash