diff --git a/games/libtmcg/Makefile b/games/libtmcg/Makefile
index 513a6ccb5fe6..d24274a801ea 100644
--- a/games/libtmcg/Makefile
+++ b/games/libtmcg/Makefile
@@ -1,27 +1,28 @@
 PORTNAME=	libtmcg
 DISTVERSION=	1.3.18
 CATEGORIES=	games security
 MASTER_SITES=	SAVANNAH
 DISTNAME=	libTMCG-${DISTVERSION}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	C++ library for creating secure and fair online card games
 WWW=		https://www.nongnu.org/libtmcg/
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libgcrypt.so:security/libgcrypt \
 		libgpg-error.so:security/libgpg-error \
 		libgmp.so:math/gmp
 
 USES=		gmake libtool localbase:ldflags
 USE_LDCONFIG=	yes
+USE_CXXSTD=	c++14 # fix build with clang-16 broken due to use of deprecated feature std::binary_function, see https://savannah.nongnu.org/bugs/index.php?64433
 
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--disable-static
 INSTALL_TARGET=	install-strip
 
 INFO=		libTMCG
 
 .include <bsd.port.mk>