diff --git a/data_uri.gemspec b/data_uri.gemspec
index c2435ab..893905f 100644
--- a/data_uri.gemspec
+++ b/data_uri.gemspec
@@ -8,7 +8,6 @@ Gem::Specification.new do |s|
   s.summary     = "A URI class for parsing data URIs as per RFC2397"
 
   s.platform = Gem::Platform::RUBY
-  s.has_rdoc = true
   s.extra_rdoc_files = ["README.rdoc"]
 
   s.require_path = 'lib'
diff --git a/lib/data_uri/uri.rb b/lib/data_uri/uri.rb
index 47cfa9e..23c6382 100644
--- a/lib/data_uri/uri.rb
+++ b/lib/data_uri/uri.rb
@@ -61,6 +61,11 @@ def self.build(arg)
     end
   end
 
-  @@schemes['DATA'] = Data
+  unless defined?(self.register_scheme)
+    def self.register_scheme(scheme, klass)
+       @@schemes[scheme] = klass
+    end
+  end
+  register_scheme 'DATA', Data
 
 end