Index: head/devel/clixon/Makefile
===================================================================
--- head/devel/clixon/Makefile	(revision 468339)
+++ head/devel/clixon/Makefile	(revision 468340)
@@ -1,28 +1,28 @@
 # $FreeBSD$
 
 PORTNAME=	clixon
 DISTVERSION=	3.6.0.b.20180424
 CATEGORIES=	devel
 
 MAINTAINER=	dcornejo@netgate.com
 COMMENT=	CLIgen is a Command-Line Interface generator
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE.md
 
 LIB_DEPENDS=	libcligen.so:devel/cligen \
 		libfcgi.so:www/fcgi
 
-USES=		gmake
+USES=		bison gmake
 
 USE_LDCONFIG=	yes
 USE_GITHUB=	yes
 GH_ACCOUNT=	clicon
 GH_TAGNAME=	d57a6cf53cdda4a3e5da122eb34de5ce069676f0
 
 GNU_CONFIGURE=	yes
 CONFIGURE_ARGS=	--with-cligen=${LOCALBASE} --sysconfdir=${ETCDIR}
 
 MAKE_JOBS_UNSAFE=yes
 
 .include <bsd.port.mk>