diff --git a/ruby-builder/PKGBUILD b/ruby-builder/PKGBUILD
index 6f2d11b54..d75cb5623 100644
--- a/ruby-builder/PKGBUILD
+++ b/ruby-builder/PKGBUILD
@@ -1,9 +1,12 @@
 # Maintainer: Adrián Chaves Fernández (Gallaecio)
 
+# This package requires the rake-contrib gem. Run:
+# $ gem install rake-contrib
+
 pkgname=ruby-builder
 _pkgname=builder
 pkgver=3.2.0
-pkgrel=1
+pkgrel=2
 pkgdesc="A simple Ruby library to create XML markup and data structures."
 arch=('x86_64')
 url="http://builder.rubyforge.org"