diff -ru dns/knot1.old/Makefile dns/knot1/Makefile
--- dns/knot1.old/Makefile	2017-01-24 15:06:34.006967134 +0000
+++ dns/knot1/Makefile	2017-01-24 15:07:44.443962470 +0000
@@ -3,6 +3,7 @@
 
 PORTNAME=	knot
 PORTVERSION=	1.6.8
+PORTREVISION=	1
 CATEGORIES=	dns ipv6
 MASTER_SITES=	https://secure.nic.cz/files/knot-dns/ \
 		http://dns-lab.com/downloads/knot-dns/
@@ -22,7 +23,9 @@
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--with-storage=/var/db/knot \
 		--with-rundir=/var/run/knot \
-		--with-openssl=${OPENSSLBASE}
+		--with-openssl=${OPENSSLBASE} \
+		--enable-recvmmsg=no
+
 USE_LDCONFIG=	yes
 USE_OPENSSL=	yes
 WITH_OPENSSL_PORT=	yes