diff --git a/audio/aacplusenc/Makefile b/audio/aacplusenc/Makefile
index 76637fc35599..96d8acec3520 100644
--- a/audio/aacplusenc/Makefile
+++ b/audio/aacplusenc/Makefile
@@ -18,6 +18,8 @@ USE_GMAKE=	yes
 
 RESTRICTED=	unclear legal status, probably need licenses from 3GPP, Via Licensing and Coding Technologies
 
+CONFLICTS=	libaacplus-[0-9]*
+
 PLIST_FILES=	bin/aacplusenc
 
 .if defined(WITHOUT_FFTW3)
diff --git a/deskutils/todo/Makefile b/deskutils/todo/Makefile
index f7462caebfd7..cbb7cf8ca97c 100644
--- a/deskutils/todo/Makefile
+++ b/deskutils/todo/Makefile
@@ -17,6 +17,8 @@ COMMENT=	Todo.txt Manager
 
 RUN_DEPENDS=	bash:${PORTSDIR}/shells/bash
 
+CONFLICTS=	devtodo-[0-9]*
+
 OPTIONS_DEFINE=	BASH
 BASH_DESC=	Install programmable completions for Bash
 
diff --git a/devel/devtodo/Makefile b/devel/devtodo/Makefile
index b2d83e4938f0..db92e23bbd1e 100644
--- a/devel/devtodo/Makefile
+++ b/devel/devtodo/Makefile
@@ -14,6 +14,8 @@ MASTER_SITES=	http://swapoff.org/files/devtodo/
 MAINTAINER=	pav@FreeBSD.org
 COMMENT=	Tool to effectively maintain todo lists aimed at developers
 
+CONFLICTS=	tdl-[0-9]* todo-[0-9]*
+
 GNU_CONFIGURE=	yes
 
 # Note: without this define util/regex.c doesn't compile due to redeclaration
diff --git a/devel/tdl/Makefile b/devel/tdl/Makefile
index d49938a31ae9..fcb14f4578ad 100644
--- a/devel/tdl/Makefile
+++ b/devel/tdl/Makefile
@@ -13,6 +13,8 @@ MASTER_SITES=	http://www.rpcurnow.force9.co.uk/tdl/
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	To-do list manager
 
+CONFLICTS=	devtodo-[0-9]*
+
 HAS_CONFIGURE=	yes
 
 CONFIGURE_ARGS+=	--prefix=${PREFIX}
diff --git a/mail/popular/Makefile b/mail/popular/Makefile
index 86ba1e7d404e..998927375df3 100644
--- a/mail/popular/Makefile
+++ b/mail/popular/Makefile
@@ -16,6 +16,8 @@ COMMENT=	Suite of programs for setting up large POP3 server systems
 
 BUILD_DEPENDS=	${SITE_PERL}/XML/DOM.pm:${PORTSDIR}/textproc/p5-XML-DOM
 
+CONFLICTS=	pserv-[0-9]* synce-librapi2-[0-9]*
+
 USE_AUTOTOOLS=	libtool
 USE_GMAKE=	yes
 GNU_CONFIGURE=	yes
diff --git a/palm/synce-librapi2/Makefile b/palm/synce-librapi2/Makefile
index e9ef45b6f143..7954ab8e4ffc 100644
--- a/palm/synce-librapi2/Makefile
+++ b/palm/synce-librapi2/Makefile
@@ -15,6 +15,8 @@ COMMENT?=	Utilities/libraries to make RAPI calls on WinCE devices
 
 LIB_DEPENDS+=	synce.0:${PORTSDIR}/palm/synce-libsynce
 
+CONFLICTS=	popular-[0-9]*
+
 GNU_CONFIGURE=	yes
 USE_AUTOTOOLS=	libtool
 USE_ICONV=	yes
diff --git a/www/pserv/Makefile b/www/pserv/Makefile
index afb930298795..c038bfd84f15 100644
--- a/www/pserv/Makefile
+++ b/www/pserv/Makefile
@@ -16,6 +16,8 @@ COMMENT=	A portable and small webserver written in C
 
 GNU_CONFIGURE=	yes
 
+CONFLICTS=	popular-[0-9]*
+
 OPTIONS=	LOG "Enable logging" on \
 		PHP "Enable PHP support" on