iptables - no TTL target?

[Mart Frauenlob <mart.frauenlob@chello.at>]

Hello,

i'm running a debian sarge with a self compiled  2.4.27 (debian) kernel 
as firewall / router.
What i'm trying to do is to increase the TTL of packets leaving a 
certain subnet by one.
Reading the iptables man page this should be able with something like this:

eris:~# iptables -I FORWARD -i eth1 -o eth0 -s 192.168.13.0/24 -j TTL 
--ttl-inc 1
iptables: No chain/target/match by that name

or:

eris:~# iptables -t mangle -A PREROUTING -i eth1 -s 192.168.13.0/24 -j 
TTL --ttl-inc 1
iptables: No chain/target/match by that name

eris:~# iptables -V
iptables v1.2.11

I'm confused about that error.
I compiled everything regarding netfilter directly into the kernel.
Even booting with the Debian kernel-image 2.4.27 brings the same result.

Any ideas what i missed installing / setting... etc?

Thank you for any help.

Regards
Mart