I patch 2.6.13.2 vanilla kernel with patch-o-matic, and I have these errors: net/built-in.o: In function `init': ipt_set.c:(.init.text+0x1c7b): undefined reference to `ipt_register_match' net/built-in.o: In function `init': ipt_SET.c:(.init.text+0x1c9b): undefined reference to `ipt_register_target' net/built-in.o: In function `fini': ipt_set.c:(.exit.text+0xbb): undefined reference to `ipt_unregister_match' net/built-in.o: In function `fini': ipt_SET.c:(.exit.text+0xdb): undefined reference to `ipt_unregister_target' make: *** [.tmp_vmlinux1] Error 1 Here is my config (nothing particular, just enabled IP_NF_SET..) http://biesas.adminas.net/~digis/config btw, http://www.ussg.iu.edu/hypermail/linux/kernel/0310.3/0466.html patch here isn't helping, because by default, in 2.6.13.2 kernel "that" line is: "depends on IP_NF_IPTABLES && BRIDGE_NETFILTER". Justinas B.