Index: head/math/rehearse/Makefile
===================================================================
--- head/math/rehearse/Makefile	(revision 520645)
+++ head/math/rehearse/Makefile	(revision 520646)
@@ -1,28 +1,28 @@
 # $FreeBSD$
 
 PORTNAME=	rehearse
 DISTVERSION=	g20190305
 CATEGORIES=	math
 PKGNAMEPREFIX=	coin-or-
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Algebraic modeling library in C++ for linear optimization solvers
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 LIB_DEPENDS=	libClp.so:math/clp \
 		libOsi.so:math/osi
 
-USES=		gmake libtool pkgconfig
+USES=		compiler:c++11-lang gmake libtool pkgconfig
 USE_GITHUB=	yes
 GH_ACCOUNT=	coin-or
 GH_PROJECT=	Rehearse
 GH_TAGNAME=	31d12f8
 GNU_CONFIGURE=	yes
 USE_LDCONFIG=	yes
 
 post-stage:
 	@${RM} -r ${STAGEDIR}${LOCALBASE}/share/coin
 
 .include <bsd.port.mk>