diff --git a/inc/temp.inc.sh b/inc/temp.inc.sh
index d7ecd67e..a6b07117 100644
--- a/inc/temp.inc.sh
+++ b/inc/temp.inc.sh
@@ -309,6 +309,7 @@ CHECKTEMP_SERVICE(){
 	done # &
 }
 CHECKTEMP_SERVICE_RUNSENSOR(){
+	declare -gA last_temp
 	SENSORa=${1}
 	logtemp=${PW_LOGFOLDER}/log-temp-${SENSORa}
 	[ ! -f ${logtemp} ] && touch ${logtemp}