Error compiling kernel with IPFILTER

[Jeremy Johnston]

/usr/src/sys/contrib/ipfilter/netinet/ip_fil.c: In function `fr_check_wrapper':
/usr/src/sys/contrib/ipfilter/netinet/ip_fil.c:319: error: `PFIL_OUT' undeclared (first use in this function)
/usr/src/sys/contrib/ipfilter/netinet/ip_fil.c:319: error: (Each undeclared identifier is reported only once
/usr/src/sys/contrib/ipfilter/netinet/ip_fil.c:319: error: for each function it appears in.)
/usr/src/sys/contrib/ipfilter/netinet/ip_fil.c: In function `fr_check_wrapper6':
/usr/src/sys/contrib/ipfilter/netinet/ip_fil.c:329: error: `PFIL_OUT' undeclared (first use in this function)
/usr/src/sys/contrib/ipfilter/netinet/ip_fil.c: In function `iplattach':
/usr/src/sys/contrib/ipfilter/netinet/ip_fil.c:376: warning: unused variable `ph_inet'
/usr/src/sys/contrib/ipfilter/netinet/ip_fil.c:378: warning: unused variable `ph_inet6'
/usr/src/sys/contrib/ipfilter/netinet/ip_fil.c: At top level:
/usr/src/sys/contrib/ipfilter/netinet/ip_fil.c:317: warning: `fr_check_wrapper' defined but not used
/usr/src/sys/contrib/ipfilter/netinet/ip_fil.c:327: warning: `fr_check_wrapper6' defined but not used
*** Error code 1

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