diff --git a/check_rc_upgrade.sh b/check_rc_upgrade.sh
index 8cf41c4..635d27a 100755
--- a/check_rc_upgrade.sh
+++ b/check_rc_upgrade.sh
@@ -78,7 +78,7 @@ do
 		[ $DEBUG -eq 1 ] && echo "Newest : $newest"
 		rm -f $CACHE_FAILED > /dev/null 2>&1
 
-		DOWNLOAD_URL=`cat $tmpfile|grep "$newest"|grep "tar.gz"|head -1|sed 's/.* href="\([^"]*\)" .*$/\1/'`
+		DOWNLOAD_URL=`cat $tmpfile|grep "$newest"|grep "tar.gz"|head -1|sed 's/.* href="[ \t]*\([^"]*\)[ \t]*" .*$/\1/'`
 		[ $DEBUG -eq 1 ] && echo "Download URL : $DOWNLOAD_URL"
 		[ ! -n "$DOWNLOAD_URL" ] && DOWNLOAD_URL="$CHECK_URL" && [ $DEBUG -eq 1 ] && echo "Use check URL as download URL : $DOWNLOAD_URL"