diff --git a/devel/docopt.cpp/Makefile b/devel/docopt.cpp/Makefile
index 83d8073018f1..80abf9a42947 100644
--- a/devel/docopt.cpp/Makefile
+++ b/devel/docopt.cpp/Makefile
@@ -1,28 +1,29 @@
 PORTNAME=	docopt.cpp
 DISTVERSIONPREFIX=	v
 DISTVERSION=	0.6.3-5
 DISTVERSIONSUFFIX=	-g400e6dd
 CATEGORIES=	devel
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	C++11 options parser based on help messages
 WWW=		https://github.com/docopt/docopt.cpp
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE-MIT
 
 USES=		cmake:testing compiler:c++11-lang python:test
 USE_LDCONFIG=	yes
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	docopt
 
 CMAKE_ON=	BUILD_SHARED_LIBS
+CMAKE_ARGS=	-DCMAKE_POLICY_VERSION_MINIMUM:STRING=3.5 # https://github.com/docopt/docopt.cpp/issues/169
 CMAKE_TESTING_ON=	WITH_TESTS
 CMAKE_TESTING_TARGET=	${ALL_TARGET}
 
 post-test:
 	@cd ${BUILD_WRKSRC} && \
 		${PYTHON_CMD} run_tests
 
 .include <bsd.port.mk>