diff --git a/x11/wmenu/Makefile b/x11/wmenu/Makefile
index 8764a8ffe766..277d9948eef3 100644
--- a/x11/wmenu/Makefile
+++ b/x11/wmenu/Makefile
@@ -29,4 +29,10 @@ LDFLAGS+=	`pkg-config --libs epoll-shim`
 PLIST_FILES=	bin/wmenu \
 		man/man1/wmenu.1.gz
 
+.include <bsd.port.options.mk>
+
+.if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1400097
+CFLAGS+=	-D__BSD_VISIBLE -D__XSI_VISIBLE
+.endif
+
 .include <bsd.port.mk>