Index: head/sysutils/twmn/Makefile
===================================================================
--- head/sysutils/twmn/Makefile	(revision 495435)
+++ head/sysutils/twmn/Makefile	(revision 495436)
@@ -1,41 +1,41 @@
 # $FreeBSD$
 
 PORTNAME=	twmn
 PORTVERSION=	g20171216
 PORTREVISION=	5
 CATEGORIES=	sysutils
 
 MAINTAINER=	dg@syrec.org
 COMMENT=	Notification system for tiling window managers
 
 LICENSE=	LGPL3
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 LIB_DEPENDS=	libboost_system.so:devel/boost-libs
 
-USES=		qmake qt:5
+USES=		compiler:c++11-lang qmake qt:5
 USE_GITHUB=	yes
 GH_ACCOUNT=	sboli
 GH_TAGNAME=	5b92ac5
 USE_QT=		core dbus gui network widgets x11extras buildtools_build
 LDFLAGS+=	-Wl,--as-needed  # see bug#224488
 
 PORTDOCS=	README.md
 PORTEXAMPLES=	*
 
 PLIST_FILES=	bin/twmnc bin/twmnd
 
 OPTIONS_DEFINE=	DOCS EXAMPLES
 
 post-install:
 	@${STRIP_CMD} ${STAGEDIR}${PREFIX}/bin/twmnc ${STAGEDIR}${PREFIX}/bin/twmnd
 
 post-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_DATA} ${PORTDOCS:S|^|${WRKSRC}/|} ${STAGEDIR}${DOCSDIR}
 
 post-install-EXAMPLES-on:
 	@${MKDIR} ${STAGEDIR}${EXAMPLESDIR}
 	cd ${WRKSRC}/examples && ${COPYTREE_SHARE} . ${STAGEDIR}${EXAMPLESDIR}
 
 .include <bsd.port.mk>