diff --git a/lib/ace.rb b/lib/ace.rb
index e597b2d..ff7e99a 100644
--- a/lib/ace.rb
+++ b/lib/ace.rb
@@ -45,7 +45,7 @@ module Ace
     end
 
     def self.subclasses
-      @subclasses ||= Array.new
+      @subclasses ||= [self]
     end
 
     def self.instances