Index: head/audio/midipp/Makefile
===================================================================
--- head/audio/midipp/Makefile	(revision 496131)
+++ head/audio/midipp/Makefile	(revision 496132)
@@ -1,23 +1,23 @@
 # Created by: Hans Petter Selasky <hselasky@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	midipp
 PORTVERSION=	2.0.0
 PORTREVISION=	2
 CATEGORIES=	audio
 MASTER_SITES=	http://www.selasky.org/hans_petter/distfiles/ \
 		http://home.selasky.org:8192/distfiles/
 
 MAINTAINER=	hselasky@FreeBSD.org
 COMMENT=	MIDI playback, recording, and live performance tool
 
 LICENSE=	BSD2CLAUSE
 
 BUILD_DEPENDS=	libumidi>=2.0.14:audio/libumidi
 LIB_DEPENDS=	libumidi20.so:audio/libumidi
 
-USES=		gl qmake qt:5 tar:bzip2
+USES=		compiler:c++11-lang gl qmake qt:5 tar:bzip2
 USE_GL=		gl
 USE_QT=		buildtools_build core gui network printsupport widgets
 
 .include <bsd.port.mk>