net.tcp.listen[] reports 0 on CentOS 7.2 even if a process is listening

This is with agent on CentOS 6.7
[root@srvzabbix ~]# /opt/zabbix/bin/zabbix_get -s srvzabbixdb -k 'net.tcp.listen[22]'
1

This is with agent on CentOS 7.2
[root@srvzabbix ~]# /opt/zabbix/bin/zabbix_get -s srvzabbix -k 'net.tcp.listen[22]'
0

[root@srvzabbix ~]# netstat -ntl | grep ':22'
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp6 0 0 :::22 :::* LISTEN