diff --git a/textproc/rubygem-openvox-strings/Makefile b/textproc/rubygem-openvox-strings/Makefile
index fecdcb3e0545..ba9dd33bb5d3 100644
--- a/textproc/rubygem-openvox-strings/Makefile
+++ b/textproc/rubygem-openvox-strings/Makefile
@@ -1,21 +1,23 @@
 PORTNAME=	openvox-strings
 PORTVERSION=	7.1.0
+PORTREVISION=	1
 CATEGORIES=	textproc rubygems
 MASTER_SITES=	RG
 
 MAINTAINER=	puppet@FreeBSD.org
 COMMENT=	Puppet documentation extraction and presentation tool
 WWW=		https://github.com/voxpupuli/openvox-strings
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 RUN_DEPENDS=	openvox-agent8>=7:sysutils/openvox-agent8 \
+		rubygem-irb>=0:devel/rubygem-irb \
 		rubygem-rgen>=0:devel/rubygem-rgen \
 		rubygem-yard>=0.9.5<0.10:textproc/rubygem-yard
 
 USES=		gem
 
 NO_ARCH=	yes
 
 .include <bsd.port.mk>