diff --git a/app/controllers/admin/asks_controller.rb b/app/controllers/admin/asks_controller.rb
index 9bcbed2..67ab8fa 100644
--- a/app/controllers/admin/asks_controller.rb
+++ b/app/controllers/admin/asks_controller.rb
@@ -159,9 +159,9 @@ class Admin::AsksController < OrbitAdminController
       ask_setting = AskCategorySetting.where(:category_id=>@category_id, :use_default.ne=>true).first
       if ask_setting.nil?
         ask_setting = AskSetting.first
-        tmp = ask_setting.custom_fields.map{|k,v| ["default@#{k}", v]}
+        tmp = ask_setting.custom_fields.map{|k,v| ["default@#{k}", v]}.to_h
       else
-        tmp = ask_setting.custom_fields.map{|k,v| ["custom@#{k}", v]}
+        tmp = ask_setting.custom_fields.map{|k,v| ["custom@#{k}", v]}.to_h
       end
       list_setting_custom_fields = @ask_list_setting.custom_fields
     else