Index: sys/modules/if_gif/Makefile
===================================================================
--- sys/modules/if_gif/Makefile
+++ sys/modules/if_gif/Makefile
@@ -5,12 +5,21 @@
 .PATH: ${.CURDIR}/../../net ${.CURDIR}/../../netinet ${.CURDIR}/../../netinet6
 
 KMOD=	if_gif
-SRCS=	if_gif.c in_gif.c opt_inet.h opt_inet6.h opt_mrouting.h
+SRCS=	if_gif.c opt_inet.h opt_inet6.h opt_mrouting.h
 
 .if !defined(KERNBUILDDIR)
+.if ${MK_INET_SUPPORT} != "no"
 opt_inet.h:
 	echo "#define INET 1" > ${.TARGET}
+.endif
+.else
+OPT_INET!= cat ${KERNBUILDDIR}/opt_inet.h; echo
+.if empty(OPT_INET)
+MK_INET_SUPPORT= no
+.endif
+.endif
 
+.if !defined(KERNBUILDDIR)
 .if ${MK_INET6_SUPPORT} != "no"
 opt_inet6.h:
 	echo "#define INET6 1" > ${.TARGET}
@@ -25,6 +34,10 @@
 .endif
 .endif
 
+.if ${MK_INET_SUPPORT} != "no"
+SRCS+=	in_gif.c
+.endif
+
 .if ${MK_INET6_SUPPORT} != "no"
 SRCS+=	in6_gif.c
 .endif