diff --git a/wms_batlarm.sh b/wms_batlarm.sh
index 9b34ec8..992ac03 100755
--- a/wms_batlarm.sh
+++ b/wms_batlarm.sh
@@ -10,7 +10,7 @@ COLORS="aa0000 $AC"       # alternate colors
 
 while :; do
     read -r STATUS < /sys/class/power_supply/BAT0/status     # battery status
-    if [ $STATUS = "Discharging" ]; then    # if status discharging
+    if [ "$STATUS" = "Discharging" ]; then    # if status discharging
 	for c in $COLORS; do    # alternate border colors
 	    chwb -c $c $(pfw)
 	    sleep $FREQ