diff --git a/lib/rdoc/rubygems_hook.rb b/lib/rdoc/rubygems_hook.rb
index fc3388c253..4e80edaf10 100644
--- a/lib/rdoc/rubygems_hook.rb
+++ b/lib/rdoc/rubygems_hook.rb
@@ -294,7 +294,7 @@ def self.generation_hook installer, specs
       return unless default_gem?
 
       # Generate document for compatibility if this is a default gem.
-      ::RDoc::RubyGemsHook.generate(installer, specs)
+      RubyGemsHook.generate(installer, specs)
     end
   end
 end