Index: head/graphics/libQGLViewer/Makefile
===================================================================
--- head/graphics/libQGLViewer/Makefile	(revision 482442)
+++ head/graphics/libQGLViewer/Makefile	(revision 482443)
@@ -1,26 +1,26 @@
 # Created by: Yuri Victorovich <yuri@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	libQGLViewer
 DISTVERSION=	2.7.1
 CATEGORIES=	graphics devel
 MASTER_SITES=	http://www.libqglviewer.com/src/
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	C++ library based on Qt5 that eases the creation of OpenGL 3D viewers
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/LICENCE
 
-USES=		qmake qt:5
+USES=		compiler:c++11-lang gl qmake qt:5
 USE_GL=		gl glu
 USE_QT=		core designer gui opengl widgets xml buildtools_build
 USE_LDCONFIG=	yes
 PLIST_SUB=	SHL3=${DISTVERSION} SHL2=${DISTVERSION:C/\.[0-9]$//} SHL1=${DISTVERSION:C/\.[0-9]\.[0-9]$//}
 
 OPTIONS_DEFINE=	DOCS
 
 DOCSDIR=	${PREFIX}/share/doc/QGLViewer
 PORTDOCS=	*
 
 .include <bsd.port.mk>