diff --git a/sysutils/cdrtools/Makefile b/sysutils/cdrtools/Makefile
index e13ffc537e4b..47fd2e2ee82b 100644
--- a/sysutils/cdrtools/Makefile
+++ b/sysutils/cdrtools/Makefile
@@ -17,6 +17,8 @@ DISTNAME=	cdrtools-2.00.3
 MAINTAINER=	dirk@FreeBSD.org
 COMMENT?=	Cdrecord, mkisofs and several other programs to record CD-R[W]
 
+CONFLICTS?=	cdrtools-devel-*
+
 .if defined(MKISOFS)
 MAN8=		apple_driver.8 isoinfo.8 mkhybrid.8 mkisofs.8
 .else
diff --git a/sysutils/mkisofs/Makefile b/sysutils/mkisofs/Makefile
index 8d54999f70dc..ef07a5cc2e49 100644
--- a/sysutils/mkisofs/Makefile
+++ b/sysutils/mkisofs/Makefile
@@ -10,8 +10,11 @@ PORTVERSION=	2.0.3
 PORTREVISION=	0
 CATEGORIES=	sysutils
 
-MASTERDIR=	${.CURDIR}/../cdrtools
 COMMENT=	Create iso9660/Rock Ridge/Joliet filesystems
+
+CONFLICTS=	mkisofs-devel-*
+
+MASTERDIR=	${.CURDIR}/../cdrtools
 DESCR=		${PKGDIR}/pkg-descr.mkisofs
 PLIST=		${PKGDIR}/pkg-plist.mkisofs