--- /lib/systemd/system/zabbix_agentd.service   2012-11-24 17:02:18.000000000 +0400
+++ /etc/systemd/system/zabbix_agentd.service   2012-11-28 14:43:34.792796601 +0400
@@ -4,6 +4,8 @@
 
 [Service]
 Type=forking
+PIDFile=/var/run/zabbix/zabbix_agentd.pid
+User=zabbix
 ExecStart=/usr/sbin/zabbix_agentd
     
 [Install]