dscp match

Is dscp match work in the recent iptables?

# uname -a
Linux router 2.4.17 #10 Tue Mar 26 01:26:47 EET 2002 i686 unknown

# iptables --version
iptables v1.2.7-20020520

# iptables -A INPUT -m dscp --dscp 0x20 -j ACCEPT
iptables: No chain/target/match by that name

The same happens with iptables 1.2.6a (from slackware-current)

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Thanks.