diff --git a/README.rdoc b/README.rdoc
index 9569c0e7..58267703 100644
--- a/README.rdoc
+++ b/README.rdoc
@@ -150,6 +150,19 @@ and overridden on an individual basis.
 
 Renders <tt>./views/index.erb</tt>
 
+=== Erubis
+
+The erubis gem/library is required to render builder templates:
+
+  ## You'll need to require erubis in your app
+  require 'erubis'
+
+  get '/' do
+    erubis :index
+  end
+
+Renders <tt>./views/index.erubis</tt>
+
 === Builder Templates
 
 The builder gem/library is required to render builder templates: