tcptrace version 6.6.7-3 failed to build on i386

tcptrace version 6.6.7-3 failed to build on i386
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110329/+buildjob/2411577

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110329/+buildjob/2411577/+files/buildlog_ubuntu-natty-i386.tcptrace_6.6.7-3_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 926 lines into the build log:

print.c:503:44: error: 'struct tcphdr' has no member named 'th_off'
print.c: In function 'printudp_packet':
print.c:535:5: error: 'struct udphdr' has no member named 'uh_sport'
print.c:536:22: error: 'struct udphdr' has no member named 'uh_sport'
print.c:538:5: error: 'struct udphdr' has no member named 'uh_dport'
print.c:539:22: error: 'struct udphdr' has no member named 'uh_dport'
print.c:541:18: error: 'struct udphdr' has no member named 'uh_ulen'
print.c:543:34: error: 'struct udphdr' has no member named 'uh_sum'
print.c:552:30: error: 'struct udphdr' has no member named 'uh_ulen'
print.c:553:25: error: 'struct udphdr' has no member named 'uh_ulen'
print.c:556:9: error: 'struct udphdr' has no member named 'uh_ulen'
make[1]: *** [print.o] Error 1
make[1]: Leaving directory `/build/buildd/tcptrace-6.6.7'
make: *** [build-stamp] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110408-1808
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/tcptrace-6.6.7