diff --git a/math/cadabra2/Makefile b/math/cadabra2/Makefile
index 625b82292062..f9d313a779ed 100644
--- a/math/cadabra2/Makefile
+++ b/math/cadabra2/Makefile
@@ -1,53 +1,55 @@
 PORTNAME=	cadabra2
 DISTVERSION=	2.4.4.1
 PORTREVISION=	1
 CATEGORIES=	math
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Computer algebra system for solving field theory problems
 WWW=		https://cadabra.science/
 
 LICENSE=	LGPL3
 LICENSE_FILE=	${WRKSRC}/doc/license.txt
 
+BROKEN_FreeBSD_15=	compilation fails with clang-17, see https://github.com/kpeeters/cadabra2/issues/285
+
 BUILD_DEPENDS=	${LOCALBASE}/include/websocketpp/client.hpp:devel/websocketpp
 LIB_DEPENDS=	${PY_BOOST} \
 		libboost_system.so:devel/boost-libs \
 		libharfbuzz.so:print/harfbuzz \
 		libpcrecpp.so:devel/pcre \
 		libjsoncpp.so:devel/jsoncpp \
 		libgmp.so:math/gmp \
 		libuuid.so:misc/e2fsprogs-libuuid
 RUN_DEPENDS=	${PYTHON_SITELIBDIR}/sympy/__init__.py:math/py-sympy@${PY_FLAVOR} \
 		${PYTHON_SITELIBDIR}/matplotlib/__init__.py:math/py-matplotlib@${PY_FLAVOR}
 
 USES=		compiler:c++14-lang cmake:noninja dos2unix gettext-runtime gnome localbase:ldflags pkgconfig python sqlite tex # USES=python picks random python versions
 USE_GNOME=	glib20 glibmm libsigc++20
 USE_TEX=	base latex texhash
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	kpeeters
 
 DOS2UNIX_FILES=	cmake/version.cmake
 
 CMAKE_ON=	ENABLE_SYSTEM_JSONCPP USE_PYTHON_3 # OFF doesn't work, still links to python3: https://github.com/kpeeters/cadabra2/issues/76
 CMAKE_OFF=	ENABLE_MATHEMATICA
 CXXFLAGS+=	-I${LOCALBASE}/include/jsoncpp
 LDFLAGS+=	-ljsoncpp
 
 PLIST_SUB=	_PY_SONAME=${_PY_SONAME}
 
 OPTIONS_DEFINE=		GUI
 OPTIONS_DEFAULT=	GUI
 OPTIONS_SUB=		yes
 
 GUI_USES=		desktop-file-utils
 GUI_USE=		GNOME=gtkmm30,gdkpixbuf2
 GUI_CMAKE_BOOL=		ENABLE_FRONTEND
 
 _PY_SONAME=	${PYTHON_EXT_SUFFIX}
 
 post-extract: # unbundle
 	@${RM} -r ${WRKSRC}/libs/jsoncpp ${WRKSRC}/libs/websocketpp
 
 .include <bsd.port.mk>