--- etc/rc.d/arpwatch.sh.orig   Tue Oct  3 15:48:38 2006
+++ etc/rc.d/arpwatch.sh        Tue Oct  3 15:57:03 2006
@@ -67,6 +67,7 @@
             for interface in ${arpwatch_interfaces}; do
                 eval options=\$arpwatch_${interface}_options
                 command_args="-i ${interface} ${options} -f arp.${interface}.dat"
+                pidfile="/var/run/arpwatch-${interface}.pid"
                 run_rc_command "$1"
             done
             ;;