diff --git a/www/zgrab2/Makefile b/www/zgrab2/Makefile
index 082e326071e0..e4552065c33d 100644
--- a/www/zgrab2/Makefile
+++ b/www/zgrab2/Makefile
@@ -1,21 +1,23 @@
 PORTNAME=	zgrab2
 DISTVERSIONPREFIX=	v
 DISTVERSION=	0.1.7
 PORTREVISION=	1
 CATEGORIES=	www
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Fast Go application scanner
 WWW=		https://github.com/zmap/zgrab2
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
+BROKEN_aarch64=	compilation fails: ztypes_freebsd_arm64.go:400:12: undefined: uint128
+
 USES=		go:modules
 
 GO_MODULE=	github.com/zmap/zgrab2
 GO_TARGET=	./cmd/${PORTNAME}
 
 PLIST_FILES=	bin/${PORTNAME}
 
 .include <bsd.port.mk>