Index: head/sys/modules/netgraph/checksum/Makefile
===================================================================
--- head/sys/modules/netgraph/checksum/Makefile	(revision 331099)
+++ head/sys/modules/netgraph/checksum/Makefile	(revision 331100)
@@ -1,20 +1,9 @@
 # $FreeBSD$
 
-.include <bsd.own.mk>
+SYSDIR?=${SRCTOP}/sys
+.include "${SYSDIR}/conf/kern.opts.mk"
 
 KMOD=	ng_checksum
 SRCS= 	ng_checksum.c opt_inet.h opt_inet6.h
-
-#.if !defined(KERNBUILDDIR)
-#
-#.if ${MK_INET_SUPPORT} != "no"
-#opt_inet.h:
-#	echo "#define INET 1" > ${.TARGET}
-#.endif
-#.if ${MK_INET6_SUPPORT} != "no"
-#opt_inet6.h:
-#	echo "#define INET6 1" > ${.TARGET}
-#.endif
-#.endif
 
 .include <bsd.kmod.mk>