Index: head/devel/py-cffi/Makefile
===================================================================
--- head/devel/py-cffi/Makefile	(revision 557785)
+++ head/devel/py-cffi/Makefile	(revision 557786)
@@ -1,38 +1,38 @@
 # Created by: William Grzybowski <wg@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	cffi
 PORTVERSION=	1.14.4
 CATEGORIES=	devel python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Foreign Function Interface for Python calling C code
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 LIB_DEPENDS=	libffi.so:devel/libffi
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pycparser>=0:devel/py-pycparser@${PY_FLAVOR}
 TEST_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pytest>0:devel/py-pytest@${PY_FLAVOR}
 
-USES=		compiler localbase python
+USES=		compiler:c11 localbase python
 USE_PYTHON=	autoplist concurrent distutils
 
 .include <bsd.port.pre.mk>
 
 .if ${CHOSEN_COMPILER_TYPE} == clang
 CFLAGS+=	-Wno-shift-negative-value
 .endif
 
 post-install:
 	${STRIP_CMD} ${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}/_cffi_backend.so
 
 do-test:
 #	cd ${TEST_WRKSRC} && ${SETENV} ${MAKE_ENV} ${PYTHON_CMD} ${PYDISTUTILS_SETUP} build_ext -i
 #	cd ${TEST_WRKSRC} && ${SETENV} ${TEST_ENV} ${PYTHON_CMD} -m pytest -rs -v
 	cd ${TEST_WRKSRC} && ${PYTHON_CMD} ${PYDISTUTILS_SETUP} build_ext -i
 	cd ${TEST_WRKSRC} && ${PYTHON_CMD} -m pytest -rs -v
 
 .include <bsd.port.post.mk>