diff --git a/databases/libiodbc/Makefile b/databases/libiodbc/Makefile
index b159dec1f16e..560c18768ab7 100644
--- a/databases/libiodbc/Makefile
+++ b/databases/libiodbc/Makefile
@@ -17,6 +17,8 @@ MASTER_SITES=	http://www.iodbc.org/dist/
 MAINTAINER=	ebakke@trolltech.com
 COMMENT=	An ODBC 3.x driver manager, for universal data source access
 
+CONFLICTS=	unixODBC-*
+
 USE_LIBTOOL=	yes
 USE_GMAKE=	yes
 INSTALLS_SHLIB=	yes
diff --git a/databases/unixODBC/Makefile b/databases/unixODBC/Makefile
index 91f4dcbd281e..edd06015ee53 100644
--- a/databases/unixODBC/Makefile
+++ b/databases/unixODBC/Makefile
@@ -16,6 +16,8 @@ COMMENT=	ODBC library suite for Unix
 
 LIB_DEPENDS=	iconv.3:${PORTSDIR}/converters/libiconv
 
+CONFLICTS=	libiodbc-*
+
 USE_REINPLACE=	yes
 USE_LIBTOOL=	yes
 CONFIGURE_TARGET=	--build=${MACHINE_ARCH}-portbld-freebsd${OSREL}