--- iptables-snmp-0.1.orig/libiptc/libip6tc.c	2005-07-05 00:11:28.000000000 +0200
+++ iptables-snmp-0.1/libiptc/libip6tc.c	2009-11-13 23:18:45.195701184 +0100
@@ -111,7 +111,7 @@ typedef unsigned int socklen_t;
 #include "libiptc.c"
 
 #define BIT6(a, l) \
- ((ntohl(a->in6_u.u6_addr32[(l) / 32]) >> (31 - ((l) & 31))) & 1)
+ ((ntohl(a->s6_addr32[(l) / 32]) >> (31 - ((l) & 31))) & 1)
 
 int
 ipv6_prefix_length(const struct in6_addr *a)