diff --git a/lang/dotnet-runtime/Makefile b/lang/dotnet-runtime/Makefile
index fc1d93b0dacf..60c84558eaf3 100644
--- a/lang/dotnet-runtime/Makefile
+++ b/lang/dotnet-runtime/Makefile
@@ -1,47 +1,50 @@
 PORTNAME=	dotnet-host
 DISTVERSIONPREFIX=	v
 DISTVERSION=	9.0.0
 CATEGORIES=	lang devel
 
 MAINTAINER=	arrowd@FreeBSD.org
 COMMENT=	Host runtime binary for the .NET platform
 WWW=		https://dot.net
 
 LICENSE=	MIT
 
+NOT_FOR_ARCHS=		i386
+NOT_FOR_ARCHS_REASON=	eng/native/functions.cmake:7: 'i386' is an unsupported architecture.
+
 BUILD_DEPENDS=	bash:shells/bash
 
 USES=		cmake:indirect llvm:noexport ssl
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	dotnet
 GH_PROJECT=	runtime
 
 PLIST_FILES=	bin/dotnet \
 		dotnet/LICENSE.TXT \
 		dotnet/THIRD-PARTY-NOTICES.TXT \
 		dotnet/dotnet
 
 DOTNET_ARCH=	${ARCH:S|amd64|x64|:C|aarch64|arm64|}
 
 .if defined(WITH_DEBUG)
 BUILD_TYPE=	Debug
 .else
 BUILD_TYPE=	Release
 .endif
 
 do-build:
 	cd ${WRKSRC} && ${SETENVI} ${MAKE_ENV} src/native/corehost/build.sh -ci -c ${BUILD_TYPE}
 
 post-build:
 	${ELFCTL} -e +noaslr ${WRKSRC}/artifacts/bin/freebsd-${DOTNET_ARCH}.${BUILD_TYPE}/corehost/dotnet
 
 do-install:
 	${MKDIR} ${STAGEDIR}${PREFIX}/dotnet
 	${INSTALL_PROGRAM} ${WRKSRC}/artifacts/bin/freebsd-${DOTNET_ARCH}.${BUILD_TYPE}/corehost/dotnet \
 		${STAGEDIR}${PREFIX}/dotnet/
 	${INSTALL_DATA} ${WRKSRC}/LICENSE.TXT ${WRKSRC}/THIRD-PARTY-NOTICES.TXT \
 		${STAGEDIR}${PREFIX}/dotnet/
 	${RLN} ${STAGEDIR}${PREFIX}/dotnet/dotnet ${STAGEDIR}${PREFIX}/bin/dotnet
 
 .include <bsd.port.mk>