diff -urN files/extra-patch-configure.orig files/extra-patch-configure
--- files/extra-patch-configure.orig	1970-01-01 07:00:00.000000000 +0700
+++ files/extra-patch-configure	2017-02-14 17:34:43.000000000 +0700
@@ -0,0 +1,17 @@
+--- configure.orig	2017-02-14 17:33:35.519483000 +0700
++++ configure	2017-02-14 17:34:26.461429000 +0700
+@@ -12165,13 +12165,12 @@
+ $as_echo "#define LIBNET_BSDISH_OS 1" >>confdefs.h
+ 
+ 
+-$as_echo "#define LIBNET_BSD_BYTE_SWAP 1" >>confdefs.h
+ 
+ 
+ $as_echo "#define HAVE_SOCKADDR_SA_LEN 1" >>confdefs.h
+ 
+ 
+-    LIBNET_CONFIG_DEFINES="-DLIBNET_BSDISH_OS -DLIBNET_BSD_BYTE_SWAP -DHAVE_SOCKADDR_SA_LEN"
++    LIBNET_CONFIG_DEFINES="-DLIBNET_BSDISH_OS -DHAVE_SOCKADDR_SA_LEN"
+     ;;
+ 
+ *netbsd*)
diff -urN Makefile.orig Makefile
--- Makefile.orig	2017-02-14 17:41:34.434807000 +0700
+++ Makefile	2017-02-14 17:40:56.154919000 +0700
@@ -3,7 +3,7 @@
 
 PORTNAME=	libnet
 PORTVERSION=	1.1.6
-PORTREVISION=	4
+PORTREVISION=	5
 PORTEPOCH=	1
 CATEGORIES=	net
 MASTER_SITES=	SF/libnet-dev
@@ -46,4 +46,10 @@
 	${MKDIR} ${STAGEDIR}${EXAMPLESDIR}/
 	${INSTALL_DATA} ${WRKSRC}/sample/*.c ${STAGEDIR}${EXAMPLESDIR}/
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+.if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1100030
+EXTRA_PATCHES+=	${PATCHDIR}/extra-patch-configure
+.endif
+
+.include <bsd.port.post.mk>