diff --git a/app/controllers/authorizations_controller.rb b/app/controllers/authorizations_controller.rb
index 603fb3197..b29eb50bf 100644
--- a/app/controllers/authorizations_controller.rb
+++ b/app/controllers/authorizations_controller.rb
@@ -1,3 +1,6 @@
+require File.join(Rails.root, "app", "models", "oauth2_provider_models_activerecord_authorization")
+require File.join(Rails.root, "app", "models", "oauth2_provider_models_activerecord_client")
+
 class AuthorizationsController < ApplicationController
   include OAuth2::Provider::Rack::AuthorizationCodesSupport
   before_filter :authenticate_user!, :except => :token