diff --git a/inc/temp.inc.sh b/inc/temp.inc.sh
index 9ee02b41..09307732 100644
--- a/inc/temp.inc.sh
+++ b/inc/temp.inc.sh
@@ -97,7 +97,8 @@ CHECKTEMP(){
 				declare -A RANGE_TEMPS
 				for R in ${PW_TEMPIND_RANGE[@]}; do
 					lookup=($(${mysql_conn} -e "SELECT sensorid,temp FROM servermonitor.sensor_data WHERE sensorid IN (${sensorsqry}) AND date >= DATE_SUB(NOW(), INTERVAL ${R} MINUTE) AND date <= DATE_SUB(NOW(), INTERVAL $(expr ${R} - 7) MINUTE) ORDER BY date ASC LIMIT ${sq}"))
-					for i in {2..$(expr ${#lookup} - 2)..2}; do
+					l=$(expr ${#lookup} - 2)
+					for i in {2..${l}..2}; do
 						RANGE_TEMPS["${R}-${lookup[${i}]}"]=${lookup[$(expr ${i} + 1)]}
 					done
 				done