title: Rails Undefined Method include when including a module in `lib` dir
body: <p>I cannot load my <code>PactHelper</code> module from my <code>lib</code> dir.</p>
  
  <pre><code># lib/pact_helper.rb
  
  module PactHelper
      def so_something
  
      end
  end
  </code></pre>
  
  <p>and</p>
  
  <pre><code># app/controllers/registrations_controller.rb
  
  class RegistrationsController &lt; ApplicationController
  
      include PactHelper
  
      def new
          ...
      end
  end
  </code></pre>
  
  <p>returns <code>undefined method 'include' for #&lt;RegistrationsController:0x5287cf8&gt;</code></p>
  
  <p>Could someone explain to me why my module is not being included?</p>