--- share/xtraceroute-resolve-location.sh.in.orig	Fri May  7 15:01:36 2004
+++ share/xtraceroute-resolve-location.sh.in	Fri May  7 15:01:57 2004
@@ -34,7 +34,7 @@
 BIND)
 	FIRST=yes
 	#while target contains a dot.
-	while [ `echo $TARGET | cut -s -f1- -d.` ] || [ $FIRST = yes ]
+	while [ -n "$TARGET" ] && [ `echo $TARGET | cut -s -f1- -d.` ] || [ $FIRST = yes ]
 	do
 		FIRST=no
 		#echo $TARGET