diff --git a/light.sh b/light.sh
index fe2fc5b..c6a7e37 100755
--- a/light.sh
+++ b/light.sh
@@ -47,8 +47,8 @@ case "$ROOM_NUMBER" in
 	  PID_FILES="$( find "$(dirname "$TMPFILE_PID_BASE")" -name "$(basename "${TMPFILE_PID_BASE}_1_*")" )"
 	  if ! [ -z "$PID_FILES" ]; then
 		for i in "$PID_FILES"; do
-	  		kill "$( cat $i )"
-	  		rm -f $i
+	  		kill "$( cat "$i" )"
+	  		rm -f "$i"
 	  	done
 	  fi
 	  COLOR_A="$(echo "$STATE" | cut -d";" -f1 | cut -d"|" -f1)"