diff --git a/biology/babel/Makefile b/biology/babel/Makefile
index 742db1c47d02..302ec54e11f4 100644
--- a/biology/babel/Makefile
+++ b/biology/babel/Makefile
@@ -1,13 +1,9 @@
-# New ports collection Makefile for:	babel
-# Date created:		Dec 4 1997
-# Whom:			frankch@waru.life.nthu.edu.tw
-#
+# Created by: frankch@waru.life.nthu.edu.tw
 # $FreeBSD$
-#
 
 PORTNAME=	babel
 PORTVERSION=	1.6
-PORTREVISION=	3
+PORTREVISION=	4
 CATEGORIES=	biology converters
 MASTER_SITES=	http://smog.com/chem/babel/files/ \
 		http://www.ccl.net/cca/software/UNIX/babel/
@@ -16,6 +12,8 @@ EXTRACT_SUFX=	.tar.Z
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Converts among various molecular file formats
 
+CONFLICTS_INSTALL=	openbabel-*
+
 MAKE_ARGS=	CC="${CC}" CFLAGS="${CFLAGS}"
 
 post-build: