diff --git a/cad/nvc/Makefile b/cad/nvc/Makefile
index 35df7ed4448d..586bb2a20971 100644
--- a/cad/nvc/Makefile
+++ b/cad/nvc/Makefile
@@ -1,49 +1,51 @@
 PORTNAME=	nvc
 DISTVERSIONPREFIX=	r
 DISTVERSION=	1.7.0
 CATEGORIES=	cad
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	VHDL compiler and simulator
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKSRC}/COPYING
 
+BROKEN_i386=	compilation fails: Please port fill_cpu_state to this OS/CPU combination, see https://github.com/nickg/nvc/issues/501
+
 BUILD_DEPENDS=	llvm-config${LLVM_VERSION}:devel/llvm${LLVM_VERSION}
 RUN_DEPENDS=	llvm${LLVM_VERSION}>0:devel/llvm${LLVM_VERSION} \
 		bash:shells/bash
 TEST_DEPENDS=	check>0:devel/check
 .if !exists(/usr/include/unwind.h)
 LIB_DEPENDS=	libunwind.so:devel/libunwind
 .endif
 
 USES=		autoreconf compiler:c++14-lang localbase pkgconfig shebangfix
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	nickg
 
 SHEBANG_FILES=	contrib/functions.sh
 
 GNU_CONFIGURE=	yes
 
 LDFLAGS+=	-lexecinfo
 
 CONFIGURE_ARGS=	--with-llvm=${LOCALBASE}/bin/llvm-config${LLVM_VERSION}
 
 TEST_TARGET=	check # one test fails
 
 MAKE_ARGS=	CFLAGS="${CFLAGS}" # only for tests
 
 LLVM_VERSION=	${LLVM_DEFAULT}
 
 # outsource build is required by the project
 BUILD_DIR=		${WRKSRC}/.build
 BUILD_WRKSRC=		${BUILD_DIR}
 CONFIGURE_WRKSRC=	${BUILD_DIR}
 INSTALL_WRKSRC=		${BUILD_DIR}
 CONFIGURE_CMD=		${WRKSRC}/configure
 
 post-install:
 	@${FIND} ${STAGEDIR}${PREFIX} -name "*.so" | ${XARGS} ${STRIP_CMD}
 
 .include <bsd.port.mk>