Index: head/math/lcalc/Makefile
===================================================================
--- head/math/lcalc/Makefile	(revision 529936)
+++ head/math/lcalc/Makefile	(revision 529937)
@@ -1,31 +1,31 @@
 # Created by: thierry@pompo.net
 # $FreeBSD$
 
 PORTNAME=	lcalc
 PORTVERSION=	1.23
 CATEGORIES=	math
 MASTER_SITES=	ftp://ftp.fu-berlin.de/unix/misc/sage/spkg/upstream/lcalc/
 
 MAINTAINER=	thierry@FreeBSD.org
 COMMENT=	L-function c++ class library and the CLI program lcalc
 
 LICENSE=	GPLv2+
 
 LIB_DEPENDS=	libgmp.so:math/gmp	\
 		libmpfr.so:math/mpfr	\
 		libpari.so:math/pari
 
 #USE_GITHUB=	yes
 #GH_ACCOUNT=	agrawroh
 #GH_PROJECT=	l-calc
 #GH_TAGNAME=	4c57471
 
-USES=		gmake localbase tar:bz2
+USES=		compiler:c++11-lang gmake localbase tar:bz2
 
 PATCH_WRKSRC=	${WRKDIR}/${DISTNAME}
 WRKSRC_SUBDIR=	src
 USE_LDCONFIG=	yes
 
 MAKE_ENV=	MAKE=${GMAKE} STAGEDIR=${STAGEDIR}
 
 .include <bsd.port.mk>