Index: head/audio/drumkv1-lv2/Makefile
===================================================================
--- head/audio/drumkv1-lv2/Makefile	(revision 481372)
+++ head/audio/drumkv1-lv2/Makefile	(revision 481373)
@@ -1,28 +1,28 @@
 # $FreeBSD$
 
 PORTNAME=	drumkv1
 DISTVERSION=	0.9.2
 CATEGORIES=	audio multimedia
 MASTER_SITES=	SF/${PORTNAME}/
 MASTER_SITES=	http://download.sourceforge.net/${PORTNAME}/
 PKGNAMESUFFIX=	-lv2
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Old-school drum-kit sampler: LV2 plugin and Jack app
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 BUILD_DEPENDS=	lv2>0:audio/lv2
 LIB_DEPENDS=	libjack.so:audio/jack \
 		libsndfile.so:audio/libsndfile \
 		liblo.so:audio/liblo
 
-USES=		gmake localbase:ldflags pkgconfig qt:5 shared-mime-info
+USES=		compiler:c++11-lang gl gmake localbase:ldflags pkgconfig qt:5 shared-mime-info
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--disable-alsa-midi
 USE_QT=		core gui widgets xml buildtools_build qmake_build
 USE_GL=		gl
 USE_LDCONFIG=	yes
 
 .include <bsd.port.mk>