lib/mongo_mapper/plugins/keys.rb in mongo_mapper-0.8.0 vs lib/mongo_mapper/plugins/keys.rb in mongo_mapper-0.8.1

@@ -1,5 +1,7 @@
 # encoding: UTF-8
+require 'mongo_mapper/plugins/keys/key'
+
 module MongoMapper
   module Plugins
     module Keys
       def self.configure(model)
         model.key :_id, ObjectId