diff --git a/audio/lv2proc/Makefile b/audio/lv2proc/Makefile
index 6e1f923786f9..b74cffd06a2b 100644
--- a/audio/lv2proc/Makefile
+++ b/audio/lv2proc/Makefile
@@ -23,4 +23,10 @@ GNU_CONFIGURE=	yes
 PLIST_FILES=	bin/lv2proc \
 		man/man1/lv2proc.1.gz
 
+.include <bsd.port.options.mk>
+
+.if ${OPSYS} == FreeBSD && ( ${OSVERSION} >= 1400079 || ( ${OSVERSION} >= 1302505 && ${OSVERSION} < 1400000 ))
+CFLAGS+=	-Wno-error=strict-prototypes
+.endif
+
 .include <bsd.port.mk>