Index: head/audio/traverso/Makefile
===================================================================
--- head/audio/traverso/Makefile	(revision 504032)
+++ head/audio/traverso/Makefile	(revision 504033)
@@ -1,39 +1,39 @@
 # $FreeBSD$
 
 PORTNAME=	traverso
 DISTVERSION=	0.49.6
 CATEGORIES=	audio
 MASTER_SITES=	https://traverso-daw.org/
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Digital audio workstation (DAW) with an innovative user interface
 
 LICENSE=	GPLv2 LGPL21
 LICENSE_COMB=	dual
 LICENSE_FILE_GPLv2=	${WRKSRC}/COPYING
 LICENSE_FILE_LGPL21=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libfftw3.so:math/fftw3 \
 		libFLAC.so:audio/flac \
 		libjack.so:audio/jack \
 		liblilv-0.so:audio/lilv \
 		libmad.so:audio/libmad \
 		libogg.so:audio/libogg \
 		libsamplerate.so:audio/libsamplerate \
 		libserd-0.so:devel/serd \
 		libsndfile.so:audio/libsndfile \
 		libsord-0.so:devel/sord \
 		libsratom-0.so:audio/sratom \
 		libvorbisfile.so:audio/libvorbis \
 		libwavpack.so:audio/wavpack
 
-USES=		cmake desktop-file-utils localbase:ldflags pkgconfig qt:5
+USES=		cmake compiler:c++11-lang desktop-file-utils localbase:ldflags pkgconfig qt:5
 USE_QT=		core gui printsupport xml widgets buildtools_build qmake_build
 
 CMAKE_OFF=	WANT_ALSA
 
 post-install:
 		${INSTALL_DATA} ${WRKSRC}/resources/${PORTNAME}.desktop ${STAGEDIR}${PREFIX}/share/applications
 		cd ${WRKSRC}/resources/freedesktop/icons && ${COPYTREE_SHARE} . ${STAGEDIR}${PREFIX}/share/icons/hicolor
 
 .include <bsd.port.mk>