diff --git a/databases/py-pglast/Makefile b/databases/py-pglast/Makefile
index a94d1ec43d67..a4ac9876b73e 100644
--- a/databases/py-pglast/Makefile
+++ b/databases/py-pglast/Makefile
@@ -1,27 +1,28 @@
 # Created by: Po-Chuan Hsieh <sunpoet@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	pglast
 PORTVERSION=	1.2
 CATEGORIES=	databases python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	a.wolk@fudosecurity.com
 COMMENT=	PostgreSQL Languages AST and statements prettifier
 
 LICENSE=	GPLv3+
 
+BROKEN_riscv64=		fails to build: PostgreSQL does not have native spinlock support on this platform
 NOT_FOR_ARCHS=		aarch64 armv6 armv7 powerpc powerpc64 powerpc64le powerpcspe
 NOT_FOR_ARCHS_REASON=	port/atomics/arch-<arch>.h: No such file or directory
 
 USES=		gmake python:3.4+
 USE_PYTHON=	autoplist distutils
 
 post-patch:
 	@${REINPLACE_CMD} -e 's|make|gmake|' ${WRKSRC}/setup.py
 
 post-install:
 	${STRIP_CMD} ${STAGEDIR}${PYTHON_SITELIBDIR}/pglast/parser.so
 
 .include <bsd.port.mk>