diff -ur visitors_0.7.orig/visitors.c visitors_0.7/visitors.c
--- visitors_0.7.orig/visitors.c	2007-08-20 19:11:54.000000000 +0900
+++ visitors_0.7/visitors.c	2009-03-28 17:38:59.000000000 +0900
@@ -1607,13 +1607,9 @@
 	char *tld;
 	int res;
 
-	if (vi_is_numeric_address(hostname)) {
-		tld = "numeric IP";
-	} else {
-		tld = strrchr(hostname, '.');
-		if (!tld) return 0;
-		tld++;
-	}
+	tld = hostname;
+	if (!tld) return 0;
+
 	res = vi_counter_incr(&vih->tld, tld);
 	if (res == 0) return 1;
 	return 0;