diff --git a/audio/vm-lv2/Makefile b/audio/vm-lv2/Makefile
index 8029472b72bb..4e27018796ab 100644
--- a/audio/vm-lv2/Makefile
+++ b/audio/vm-lv2/Makefile
@@ -1,27 +1,33 @@
 PORTNAME=	vm
 DISTVERSION=	0.14.0
 PORTREVISION=	2
 CATEGORIES=	audio
 MASTER_SITES=	https://git.open-music-kontrollers.ch/lv2/vm.lv2/snapshot/
 PKGNAMESUFFIX=	-lv2
 DISTNAME=	${PORTNAME}.lv2-${DISTVERSION}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Virtual machine LV2 plugin bundle
 WWW=		https://open-music-kontrollers.ch/lv2/vm/
 
 LICENSE=	ART20
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 BUILD_DEPENDS=	lv2>0:audio/lv2 \
 		lv2lint:audio/lv2lint
 LIB_DEPENDS=	liblilv-0.so:audio/lilv \
 		libserd-0.so:devel/serd \
 		libsord-0.so:devel/sord \
 		libsratom-0.so:audio/sratom
 
 USES=		compiler:c++11-lib gl meson pkgconfig localbase tar:xz xorg
-USE_XORG=	x11 xext
 USE_GL=		gl glew glu
+USE_XORG=	x11 xext
+
+.include <bsd.port.options.mk>
+
+.if ${OPSYS} == FreeBSD && ( ${OSVERSION} >= 1400079 || ( ${OSVERSION} >= 1302505 && ${OSVERSION} < 1400000 ))
+CFLAGS+=	-Wno-error=int-conversion
+.endif
 
 .include <bsd.port.mk>