diff --git a/lib/paperclip.rb b/lib/paperclip.rb
index a3c7e213b..003cafd1e 100644
--- a/lib/paperclip.rb
+++ b/lib/paperclip.rb
@@ -173,13 +173,7 @@ module ClassMethods
     #     end
     #   end
     def has_attached_file(name, options = {})
-      if attachment_definitions.nil?
-        self.attachment_definitions = {}
-      else
-        self.attachment_definitions = self.attachment_definitions.dup
-      end
-
-      options = attachment_definitions[name] = Paperclip::AttachmentOptions.new(options)
+      options = Paperclip::AttachmentOptions.new(options)
       Paperclip.classes_with_attachments << self.name
       Paperclip.check_for_path_clash(name, options[:path], self.name)
 
@@ -220,12 +214,6 @@ def has_attached_file(name, options = {})
         attachment.send(:flush_errors)
       end
     end
-
-    # Returns the attachment definitions defined by each call to
-    # has_attached_file.
-    def attachment_definitions
-      self.attachment_definitions
-    end
   end
 end
 
diff --git a/lib/paperclip/glue.rb b/lib/paperclip/glue.rb
index b358ae571..2d14c627a 100644
--- a/lib/paperclip/glue.rb
+++ b/lib/paperclip/glue.rb
@@ -9,7 +9,6 @@ def self.included(base)
       base.send :include, Callbacks
       base.send :include, Validators
       base.send :include, Schema if defined? ActiveRecord
-      base.class_attribute :attachment_definitions
 
       locale_path = Dir.glob(File.dirname(__FILE__) + "/locales/*.{rb,yml}")
       I18n.load_path += locale_path unless I18n.load_path.include?(locale_path)