diff --git a/inc/power.inc.sh b/inc/power.inc.sh
index f8aae0fc..1b35f604 100644
--- a/inc/power.inc.sh
+++ b/inc/power.inc.sh
@@ -889,8 +889,9 @@ PDUCONTROL(){
 		fi
 	
 		[ "${PORTSEL^^}" == "E" ] && exit 0
-	
-		if [ "${PORTSEL}" != "" ]; then
+		
+		# tp=$(expr ${PORTSEL} - 1)
+		if [ "${PORT_DESC[$(expr ${PORTSEL} - 1)]}" != "" ]; then
 			portsel_power=$(snmpwalk -t 1 -r 0 -v 1 -c public ${PW_APCPDU_IP} .1.3.6.1.4.1.318.1.1.12.3.3.1.1.4.${PORTSEL} -O vq 2> /dev/null | sed -e 's/"//g')
 			[ ${portsel_power} -eq 1 ] && portsel_power_disp="${idsCL[Green]}ON" || portsel_power_disp="${idsCL[LightRed]}OFF"
 			[ ${portsel_power} -eq 2 ] && portsel_change_power_disp="${idsCL[Green]}ON" || portsel_change_power_disp="${idsCL[LightRed]}OFF"