diff --git a/app/controllers/scimitar/application_controller.rb b/app/controllers/scimitar/application_controller.rb
index 7cb7488..e9e4c71 100644
--- a/app/controllers/scimitar/application_controller.rb
+++ b/app/controllers/scimitar/application_controller.rb
@@ -9,10 +9,6 @@ class ApplicationController < ActionController::Base
     before_action :add_mandatory_response_headers
     before_action :authenticate
 
-    if Scimitar.engine_configuration.application_controller_mixin
-      include Scimitar.engine_configuration.application_controller_mixin
-    end
-
     # =========================================================================
     # PROTECTED INSTANCE METHODS
     # =========================================================================
@@ -153,5 +149,8 @@ def authenticated?
         return result
       end
 
+    if Scimitar.engine_configuration.application_controller_mixin
+      include Scimitar.engine_configuration.application_controller_mixin
+    end
   end
 end