diff --git a/powerwall.sh b/powerwall.sh
index 435a43f9..a1c21c26 100755
--- a/powerwall.sh
+++ b/powerwall.sh
@@ -1615,6 +1615,7 @@ PDUCONTROL(){
 			;;
 		*)
 			if [ "${PORT_SEL}" == "" ]; then
+				unset PORTSEL
 				PDUCONTROL
 				exit 0
 			fi