Index: head/textproc/py-jsonslicer/Makefile
===================================================================
--- head/textproc/py-jsonslicer/Makefile	(revision 495747)
+++ head/textproc/py-jsonslicer/Makefile	(revision 495748)
@@ -1,30 +1,30 @@
 # Created by: Dmitry Marakasov <amdmi3@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	jsonslicer
 PORTVERSION=	0.1.4
 CATEGORIES=	textproc python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	amdmi3@FreeBSD.org
 COMMENT=	Stream JSON parser for Python
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 LIB_DEPENDS=	libyajl.so:devel/yajl
 
-USES=		python:3.5+ pkgconfig
+USES=		compiler:c++11-lang pkgconfig python:3.5+
 USE_PYTHON=	autoplist distutils
 
 # pydistutils problem, it uses CC for compiling C++ code
 CC=		${CXX}
 
 post-install:
 	@${STRIP_CMD} ${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}/jsonslicer.so
 
 do-test:
 	@cd ${WRKSRC} && ${PYTHON_CMD} ${PYDISTUTILS_SETUP} test
 
 .include <bsd.port.mk>