diff --git a/devel/libclc/Makefile b/devel/libclc/Makefile
index 97aabb285f5c..633a801aeffe 100644
--- a/devel/libclc/Makefile
+++ b/devel/libclc/Makefile
@@ -1,61 +1,65 @@
 PORTNAME=	libclc
 DISTVERSION=	${DISTVERSION_${FLAVOR}}
 DISTVERSION_llvm22=	22.1.5
 DISTVERSION_llvm21=	21.1.8
 DISTVERSION_llvm20=	20.1.8
 DISTVERSION_llvm19=	19.1.7
 DISTVERSION_llvm18=	18.1.8
 DISTVERSION_llvm17=	17.0.6
 DISTVERSION_llvm16=	16.0.6
 DISTVERSION_llvm15=	15.0.7
 CATEGORIES=	devel
 MASTER_SITES=	https://github.com/llvm/llvm-project/releases/download/llvmorg-${DISTVERSION}/
 DISTNAME=	libclc-${DISTVERSION}.src
 PKGNAMESUFFIX=	-${FLAVOR}
 
 MAINTAINER=	x11@FreeBSD.org
 COMMENT=	Required library functions for OpenCL C programming language
 WWW=		https://libclc.llvm.org/
 
 LICENSE=	LLVM
 LICENSE_FILE=	${WRKSRC}/LICENSE.TXT
 LICENSE_NAME=	Apache License 2.0 with LLVM Exceptions
 LICENSE_PERMS=	dist-mirror dist-sell pkg-mirror pkg-sell auto-accept
 
 BUILD_DEPENDS=	spirv-llvm-translator-${FLAVOR}>0:devel/spirv-llvm-translator@${FLAVOR} \
 		libedit>=0:devel/libedit
 
 FLAVORS=	${15 16 17 18 19 20 21 22:L:S/^/llvm/}
 
 USES=		cmake compiler:c++11-lib llvm:${FLAVOR:S/llvm//},build python:build tar:xz
 USE_LDCONFIG=	${PREFIX}/${FLAVOR}/lib
 
 BINARY_ALIAS=	python=${PYTHON_CMD}
 CMAKE_ARGS+=	-DLLVM_DIR:PATH="${LOCALBASE}/${FLAVOR}" \
 		-DCMAKE_PREFIX_PATH="${LOCALBASE}/${FLAVOR}"
 CMAKE_INSTALL_PREFIX=		${PREFIX}/${FLAVOR}
 DISTINFO_FILE=	${.CURDIR}/distinfo.${FLAVOR}
 NO_ARCH=	yes
 
 .include <bsd.port.pre.mk>
 
+.if ${FLAVOR} == llvm15
+BROKEN_FreeBSD_16=	Base libc++ is now too fresh for Clang 15 to compile
+.endif
+
 .if ${FLAVOR:S/llvm//} >= 22
 DISTNAME=	llvm-project-${DISTVERSION}.src
 WRKSRC_SUBDIR=	libclc
 .endif
 
 .for i in ${FLAVORS:S/llvm//}
 .if ${FLAVOR:S/llvm//} >= ${i}
 PLIST_SUB+=	LLVM_GE${i}="" LLVM_LT${i}="@comment "
 .else
 PLIST_SUB+=	LLVM_GE${i}="@comment " LLVM_LT${i}=""
 .endif
 .endfor
 PLIST_SUB+=	LLVM_VERSION=${FLAVOR}
 
 post-patch:
 	@${REINPLACE_CMD} \
 		's,$${CMAKE_INSTALL_DATADIR}/pkgconfig,$${CMAKE_INSTALL_PREFIX}/libdata/pkgconfig,' \
 		${WRKSRC}/CMakeLists.txt
 
 .include <bsd.port.post.mk>