diff -urNp initscripts-9.03.31-orig/rc.d/rc.sysinit initscripts-9.03.31/rc.d/rc.sysinit
--- initscripts-9.03.31-orig/rc.d/rc.sysinit	2012-04-27 11:48:34.000000000 +0200
+++ initscripts-9.03.31/rc.d/rc.sysinit	2012-05-23 17:15:24.757739186 +0200
@@ -156,7 +156,7 @@ apply_sysctl
 # Set the hostname.
 update_boot_stage RChostname
 action $"Setting hostname ${HOSTNAME}: " hostname ${HOSTNAME}
-[ -z "${NISDOMAIN}" ] && domainname ${NISDOMAIN}
+[ -n "${NISDOMAIN}" ] && domainname ${NISDOMAIN}
 
 # Sync waiting for storage.
 { rmmod scsi_wait_scan ; modprobe scsi_wait_scan ; rmmod scsi_wait_scan ; } >/dev/null 2>&1