Index: head/x11-toolkits/qml-box2d/Makefile
===================================================================
--- head/x11-toolkits/qml-box2d/Makefile	(revision 482569)
+++ head/x11-toolkits/qml-box2d/Makefile	(revision 482570)
@@ -1,18 +1,18 @@
 # $FreeBSD$
 
 PORTNAME=	qml-box2d
 DISTVERSION=	2.0.20180109
 CATEGORIES=	x11-toolkits
 
 MAINTAINER=	kde@FreeBSD.org
 COMMENT=	QML Box2D plugin
 
-USES=		qmake:outsource qt:5
+USES=		compiler:c++11-lang qmake:outsource qt:5
 USE_GITHUB=	yes
 GH_TAGNAME=	21e57f
 USE_GL=		gl
 USE_QT=		core gui network qml quick \
 		buildtools_build qmake_build
 USE_LDCONFIG=	${QT_QMLDIR}/Box2D.2.0/
 
 .include <bsd.port.mk>