diff --git a/textproc/ruby-htree/Makefile b/textproc/ruby-htree/Makefile
index a0cd5772b62d..2ff0d5720f5a 100644
--- a/textproc/ruby-htree/Makefile
+++ b/textproc/ruby-htree/Makefile
@@ -3,6 +3,7 @@
 
 PORTNAME=	htree
 PORTVERSION=	0.8
+PORTREVISION=	1
 CATEGORIES=	textproc www ruby
 MASTER_SITES=	http://www.a-k-r.org/htree/
 PKGNAMEPREFIX=	${RUBY_PKGNAMEPREFIX}
@@ -11,6 +12,8 @@ DIST_SUBDIR=	ruby
 MAINTAINER=	knu@FreeBSD.org
 COMMENT=	Ruby library to manipulate HTML/XML tree data structure
 
+BUILD_DEPENDS=	rubygem-rdoc>=0.a:devel/rubygem-rdoc
+
 OPTIONS_DEFINE=	DOCS
 
 USE_RUBY=	yes