diff --git a/sysutils/cfengine-masterfiles318/Makefile b/sysutils/cfengine-masterfiles318/Makefile
index a40ac337fa66..c03642560146 100644
--- a/sysutils/cfengine-masterfiles318/Makefile
+++ b/sysutils/cfengine-masterfiles318/Makefile
@@ -1,29 +1,33 @@
 # Created by: cy@FreeBSD.org
 
 PORTNAME=	cfengine-masterfiles
 PORTVERSION=	3.18.0
 CATEGORIES=	sysutils
 MASTER_SITES=	https://cfengine-package-repos.s3.amazonaws.com/tarballs/
 
 MAINTAINER=	cy@FreeBSD.org
 #		gjb@FreeBSD.org is also committer for this port
 #		skreuzer@FreeBSD.org is also committer for this port
 COMMENT=	cfengine sample policies for installations and upgrades
 
 LICENSE=	GPLv3
 
 CPE_VENDOR=	gnu
 
 CONFLICTS=	cfengine-masterfiles3[0-9]-* cfengine-masterfiles31[0-79]-*
+.if !defined(MASTERDIR)
+PKGNAMESUFFIX=	318
+CONFLICTS+=	cfengine-masterfiles-3.*
+.endif
 
 RUN_DEPENDS=	cf-agent:sysutils/cfengine${PKGNAMESUFFIX}
 
 FETCH_BEFORE_ARGS=	-o ${DISTDIR}/${DISTFILES}
 
 MAKE_JOBS_UNSAFE=	yes
 USES=		cpe gmake python:build
 HAS_CONFIGURE=	yes
 EXAMPLESDIR=	${PREFIX}/share/examples/cfengine-masterfiles
 CONFIGURE_ARGS=	--prefix=${EXAMPLESDIR}
 
 .include <bsd.port.mk>