diff --git a/devel/concurrencpp/Makefile b/devel/concurrencpp/Makefile
index 2f35d9da2b21..d9e4c0fd9fbe 100644
--- a/devel/concurrencpp/Makefile
+++ b/devel/concurrencpp/Makefile
@@ -1,27 +1,36 @@
 PORTNAME=	concurrencpp
 DISTVERSIONPREFIX=	v.
 DISTVERSION=	0.1.4
 CATEGORIES=	devel
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	C++ concurrency library: tasks, executors, timers, C++20 coroutines
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
 BROKEN_FreeBSD_12=	fatal error: 'semaphore' file not found (missing C++ include <semaphore>)
 
 USES=		cmake compiler:c++17-lang # should be compiler:c++20-lang
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	David-Haim
 
 CMAKE_ON=	BUILD_SHARED_LIBS
 
+.include <bsd.port.options.mk>
+
+.if ${ARCH} == powerpc64le && ${OSVERSION} < 1300523
+BUILD_DEPENDS=	llvm13>0:devel/llvm13
+CPP=		${LOCALBASE}/bin/clang-cpp13
+CC=		${LOCALBASE}/bin/clang13
+CXX=		${LOCALBASE}/bin/clang++13
+.endif
+
 do-test: # same as recommended in https://github.com/David-Haim/concurrencpp#building-installing-and-testing
 	@cd ${WRKSRC} && \
 		${CMAKE_BIN} -S test -B build/test && \
 		${CMAKE_BIN} --build build/test && \
 		cd build/test && ctest .
 
 .include <bsd.port.mk>