diff --git a/misc/opennn/Makefile b/misc/opennn/Makefile
index 600ebd243910..8e3cf078492e 100644
--- a/misc/opennn/Makefile
+++ b/misc/opennn/Makefile
@@ -1,36 +1,41 @@
 PORTNAME=	opennn
 DISTVERSION=	5.0.5
 PORTREVISION=	1
 CATEGORIES=	misc # machine-learning
 MASTER_SITES=	https://github.com/Artelnics/opennn/archive/refs/tags/v${DISTVERSION}${EXTRACT_SUFX}?dummy=/
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Open neural networks library
 
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
 BROKEN_armv6=	fatal error: 'omp.h' file not found
 BROKEN_armv7=	fatal error: 'omp.h' file not found
-BROKEN_riscv64=	fatal error: 'omp.h' file not found
 
 USES=		cmake:testing compiler:c++11-lang dos2unix zip
 USE_LDCONFIG=	yes
 
 DOS2UNIX_FILES=	opennn/CMakeLists.txt
 
 CMAKE_OFF=	OpenNN_BUILD_EXAMPLES OpenNN_BUILD_TESTS
 CMAKE_TESTING_ON=	OpenNN_BUILD_TESTS # some tests fail, see https://github.com/Artelnics/opennn/issues/229
 CMAKE_TESTING_TARGET=	tests
 
 LDFLAGS+=	-lomp -pthread # https://github.com/Artelnics/opennn/issues/182
 
+.include <bsd.port.pre.mk>
+
+.if ${OSVERSION} < 1301000
+BROKEN_riscv64=	fatal error: 'omp.h' file not found
+.endif
+
 do-install:
 	${MKDIR} ${STAGEDIR}${PREFIX}/include/${PORTNAME} && ${INSTALL_DATA} ${WRKSRC}/${PORTNAME}/*.h ${STAGEDIR}${PREFIX}/include/${PORTNAME}
 	${INSTALL_DATA} ${BUILD_WRKSRC}/${PORTNAME}/libopennn.so ${STAGEDIR}${PREFIX}/lib
 	${STRIP_CMD} ${STAGEDIR}${PREFIX}/lib/libopennn.so
 
 post-test:
 	@cd ${TEST_WRKSRC} && (${ECHO} suite | tests/tests)
 
-.include <bsd.port.mk>
+.include <bsd.port.post.mk>