diff --git a/math/py-clingo/Makefile b/math/py-clingo/Makefile
index e5cef632449d..19fb40168268 100644
--- a/math/py-clingo/Makefile
+++ b/math/py-clingo/Makefile
@@ -1,27 +1,29 @@
 PORTNAME=	clingo
 DISTVERSION=	5.6.2
+PORTREVISION=	1
 CATEGORIES=	math python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Grounder and solver for logic programs
 WWW=		https://potassco.org/clingo/
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE.md
 
 BUILD_DEPENDS=	cmake:devel/cmake-core \
 		${PYTHON_PKGNAMEPREFIX}cffi>0:devel/py-cffi@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}scikit-build>0:devel/py-scikit-build@${PY_FLAVOR}
+RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}cffi>0:devel/py-cffi@${PY_FLAVOR}
 
 USES=		compiler:c++14-lang python:3.6+
 USE_PYTHON=	distutils autoplist unittest
 
 TEST_ENV=	${MAKE_ENV} PYTHONPATH=${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}/clingo
 TEST_WRKSRC=	${WRKSRC}/libpyclingo
 
 post-install:
 	@${STRIP_CMD} ${STAGEDIR}${PYTHON_SITELIBDIR}/clingo/_clingo${PYTHON_EXT_SUFFIX}.so
 
 .include <bsd.port.mk>