diff --git a/devel/boost-jam/Makefile b/devel/boost-jam/Makefile
index 9cbb76a156f9..3f2a8a680349 100644
--- a/devel/boost-jam/Makefile
+++ b/devel/boost-jam/Makefile
@@ -1,26 +1,26 @@
 # Created by: Alexander Churanov <churanov.port.maintainer@gmail.com>
 
 PORTNAME=	boost-jam
 COMMENT=	Build tool from the boost.org
 
 PLIST_FILES=	bin/bjam
 
 LICENSE=	BSL
 
 EXTRACT_AFTER_ARGS=	--no-same-owner --no-same-permissions ${DISTNAME}/${WRKSRC_SUBDIR}
 MAKE_CMD=	./build.sh
 ALL_TARGET=	${CHOSEN_COMPILER_TYPE} ${WITH_DEBUG:D--debug}
-MAKE_FLAGS=	#
+MAKE_FLAGS=	--cxxflags="${CXXFLAGS}"
 _MAKE_JOBS=	#
 MAKEFILE=	#
 
 USES=		compiler:c++11-lang
 
 WRKSRC_SUBDIR=	tools/build/src/engine
 
 .include "${.CURDIR}/../boost-all/common.mk"
 
 do-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/bjam ${STAGEDIR}${PREFIX}/bin
 
 .include <bsd.port.mk>