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
@@ -21,7 +21,13 @@ LIB_DEPENDS=	liblilv-0.so:audio/lilv \
 		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>