Debian GNU/kFreeBSD porting patch, by Petr Salinger <Petr.Salinger@seznam.cz>.
---
 configure    |    1 +
 configure.in |    1 +
 2 files changed, 2 insertions(+)

--- a/configure
+++ b/configure
@@ -4141,6 +4141,7 @@
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
 #include <sys/types.h>
+#include <net/if_pflog.h>
 #include <sys/socket.h>
 #include <net/if.h>
 
--- a/configure.in
+++ b/configure.in
@@ -31,6 +31,7 @@
 fi
 AC_CHECK_HEADERS(fcntl.h rpc/rpcent.h netdnet/dnetdb.h)
 AC_CHECK_HEADERS(net/pfvar.h, , , [#include <sys/types.h>
+#include <net/if_pflog.h>
 #include <sys/socket.h>
 #include <net/if.h>])
 if test "$ac_cv_header_net_pfvar_h" = yes; then