reloading lib files with rails

When in development mode rails picks up any changes to the controller, help and view files between each page refresh automatically. However, it doesn't pick up any changes in my custom ruby files under the lib folder. Is there any way to make it do this?

When in development mode rails picks up any changes to the controller,
help and view files between each page refresh automatically. However, it
doesn't pick up any changes in my custom ruby files under the lib
folder. Is there any way to make it do this?

class MyLib
   include Reloadable
   ....
end

Works for models that aren't based on ActiveRecord at least...