Index: head/net-p2p/py-libtorrent-rasterbar/Makefile
===================================================================
--- head/net-p2p/py-libtorrent-rasterbar/Makefile	(revision 499768)
+++ head/net-p2p/py-libtorrent-rasterbar/Makefile	(revision 499769)
@@ -1,32 +1,32 @@
 # Created by: Doug Barton <dougb@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	libtorrent-rasterbar
 DISTVERSION=	1.1.10
 PORTREVISION=	3
 CATEGORIES=	net-p2p ipv6 python
 MASTER_SITES=	https://github.com/arvidn/libtorrent/releases/download/libtorrent-${PORTVERSION:S/./_/g}/
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Python bindings for libtorrent-rasterbar
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/../../COPYING
 
 LIB_DEPENDS=	libtorrent-rasterbar.so:net-p2p/libtorrent-rasterbar \
 		${PY_BOOST}
 
-USES=		iconv localbase python
+USES=		compiler:c11 iconv localbase python
 USE_PYTHON=	distutils autoplist
 
 CFLAGS+=	-DTORRENT_DISABLE_LOGGING # undefined symbol: https://github.com/arvidn/libtorrent/issues/3331
 LDFLAGS+=	${LOCALBASE}/lib/libboost_python${PYTHON_SUFFIX}.so ${LOCALBASE}/lib/libiconv.so # fails to link libs: https://github.com/arvidn/libtorrent/issues/3330
 
 WRKSRC_SUBDIR=	bindings/python
 
 # ensure python paths are correctly identified
 CONFIGURE_ENV=	PYTHON_INCLUDEDIR="${PYTHON_INCLUDEDIR}" \
 		PYTHON_VERSION="${PYTHON_VERSION}"
 
 .include <bsd.port.mk>