diff --git a/app/controllers/subjects_controller.rb b/app/controllers/subjects_controller.rb
index 20b28121f..4fa818099 100644
--- a/app/controllers/subjects_controller.rb
+++ b/app/controllers/subjects_controller.rb
@@ -25,7 +25,7 @@ class SubjectsController < ApplicationController
         @subjects = Subject.find_by_sql("SELECT subjects.id, subjects.user_id, subjects.name, subjects.stages_count, subjects.repertoire_id, subjects.status,
                       subjects.shixuns_count, sum(shixuns.myshixuns_count) AS myshixun_member_count FROM subjects join stage_shixuns
                       on stage_shixuns.subject_id = subjects.id join shixuns on shixuns.id = stage_shixuns.shixun_id where
-                      subjects`.`hidden` = 0 AND `subjects`.`status` = 2 AND `subjects`.`name` like '%#{search}%'
+                      'subjects'.'hidden' = 0 AND `subjects`.`status` = 2 AND `subjects`.`name` like '%#{search}%'
                       AND `subjects`.`repertoire_id` = #{select} GROUP BY subjects.id ORDER BY myshixun_member_count DESC")
       else
         @subjects = Subject.find_by_sql("SELECT subjects.id, subjects.user_id, subjects.name, subjects.stages_count, subjects.repertoire_id, subjects.status,