--- Net-IP-1.25/IP.pm.orig	2006-05-23 01:46:40.000000000 +0900
+++ Net-IP-1.25/IP.pm	2006-07-04 01:54:55.000000000 +0900
@@ -410,7 +410,7 @@
 
     my $int = ip_bintoint($self->binip());
 
-    if (!$int) {
+    if (ref($int) ne "Math::BigInt") {
         $self->{error} = $ERROR;
         $self->{errno} = $ERRNO;
         return;