Index: head/devel/rubygem-protocol/Makefile
===================================================================
--- head/devel/rubygem-protocol/Makefile	(revision 445506)
+++ head/devel/rubygem-protocol/Makefile	(revision 445507)
@@ -1,19 +1,22 @@
 # Created by: Po-Chuan Hsieh <sunpoet@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	protocol
 PORTVERSION=	1.0.1
+PORTREVISION=	1
 CATEGORIES=	devel rubygems
 MASTER_SITES=	RG
 
 MAINTAINER=	sunpoet@FreeBSD.org
 COMMENT=	Method Protocols for Ruby Classes
 
 LICENSE=	GPLv2
 LICENSE_FILE=	${WRKSRC}/COPYING
+
+RUN_DEPENDS=	rubygem-ruby_parser>=3.0:devel/rubygem-ruby_parser
 
 NO_ARCH=	yes
 USE_RUBY=	yes
 USES=		gem
 
 .include <bsd.port.mk>