diff --git a/backend/app/controllers/posts_controller.rb b/backend/app/controllers/posts_controller.rb
index 9a4b9b0..44f6722 100644
--- a/backend/app/controllers/posts_controller.rb
+++ b/backend/app/controllers/posts_controller.rb
@@ -71,7 +71,7 @@ class PostsController < ApplicationController
           'posts.original_created_from,' +
           'posts.created_at) '
         when 'updated_at'
-          'posts.updated_at_all'
+          updated_at_all_sql
         else
           "posts.#{ order[0] }"
         end