diff --git a/biology/ncbi-cxx-toolkit/Makefile b/biology/ncbi-cxx-toolkit/Makefile
index 69c6e8bbe9db..3c75d8a9a618 100644
--- a/biology/ncbi-cxx-toolkit/Makefile
+++ b/biology/ncbi-cxx-toolkit/Makefile
@@ -1,52 +1,54 @@
 PORTNAME=	ncbi-cxx-toolkit
 DISTVERSIONPREFIX=	release/
 DISTVERSION=	29.7.0
 CATEGORIES=	biology science devel
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	NCBI C++ Toolkit
 WWW=		https://ncbi.github.io/cxx-toolkit/ \
 		https://github.com/ncbi/ncbi-cxx-toolkit-public
 
 LICENSE=	PD
 LICENSE_FILE=	${WRKSRC}/doc/public/LICENSE
 
-BROKEN_i386=	compilation fails: Only 64-bit Intel and ARM architectures are supported (in src/util/compress/zlib_cloudflare/deflate.c:149)
+# uses intrincs for CRC computation, probably easy to port if desired
+ONLY_FOR_ARCHS=	aarch64 amd64
+ONLY_FOR_ARCHS_REASON=	deflate.c:149:2: error: "Only 64-bit Intel and ARM architectures are supported"
 
 LIB_DEPENDS=	libcdd.so:math/cddlib \
 		liblmdb.so:databases/lmdb \
 		libpcre.so:devel/pcre \
 		libunwind.so:devel/libunwind \
 		libzstd.so:archivers/zstd
 RUN_DEPENDS=	bash:shells/bash
 
 USES=		compiler:c++17-lang gmake mysql perl5 python shebangfix ssl xorg
 USE_XORG=	x11 xpm
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	ncbi
 GH_PROJECT=	${PORTNAME}-public
 
 SHEBANG_FILES=	src/app/blast/get_species_taxids.sh
 SHEBANG_GLOB=	*.pl *.py
 
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--without-debug --with-dll --without-static \
 		--without-vdb
 
 CONFLICTS_INSTALL=	dakota libxdiff ncbi-blast+ ncbi-toolkit proj \
 			py*-speedtest-cli # bin/blast_formatter bin/speedtest bin/test_regexp lib/libeutils.so lib/libproj.so lib/libxdiff.so
 
 post-install:
 	# strip
 	@${FIND} ${STAGEDIR}${PREFIX}/bin -type f | ${GREP} -v -E '\.(sh|py|pl)$$' | ${XARGS} ${STRIP_CMD}
 	@${FIND} ${STAGEDIR}${PREFIX}/lib -name "*.so" | ${XARGS} ${STRIP_CMD}
 	# remove the conflicting files
 	@${RM} \
 		${STAGEDIR}${PREFIX}/lib/libcdd.so \
 		${STAGEDIR}${PREFIX}/lib/liblmdb.so
 	# autoplist: thousands of files
 	@cd ${STAGEDIR}${PREFIX} && \
 		${FIND} * -type f -or -type l >> ${TMPPLIST}
 
 .include <bsd.port.mk>