Index: head/science/xdrawchem/Makefile
===================================================================
--- head/science/xdrawchem/Makefile	(revision 487930)
+++ head/science/xdrawchem/Makefile	(revision 487931)
@@ -1,27 +1,27 @@
 # $FreeBSD$
 
 PORTNAME=	xdrawchem
 DISTVERSION=	1.10.2-1
 PORTREVISION=	1
 CATEGORIES=	science
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Two-dimensional molecule drawing program
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/doc/GPL.txt
 
 LIB_DEPENDS=	libopenbabel.so:science/openbabel
 
-USES=		qmake qt:5
+USES=		compiler:c++11-lang gl qmake qt:5
 USE_GITHUB=	yes
 GH_ACCOUNT=	bryanherger
 USE_QT=		core gui network printsupport widgets xml buildtools_build
 USE_GL=		gl
 
 WRKSRC_SUBDIR=	${PORTNAME}-qt5
 
 post-install:
 	@${STRIP_CMD} ${STAGEDIR}${PREFIX}/bin/${PORTNAME}
 
 .include <bsd.port.mk>