diff --git a/app/controllers/admin/asks_controller.rb b/app/controllers/admin/asks_controller.rb
index 50a0543..3b1af7d 100644
--- a/app/controllers/admin/asks_controller.rb
+++ b/app/controllers/admin/asks_controller.rb
@@ -276,6 +276,9 @@ class Admin::AsksController < OrbitAdminController
       ask_setting = AskSetting.first
       ask_setting = AskSetting.create() if ask_setting.nil?
     end
+    if temp_params['custom_values'].nil?
+      temp_params['custom_values'] = {}
+    end
     ask_setting.custom_fields.select{|k,v| v['type']=='file' || v['type']=='image'}.each do |k,v|
       file = temp_params['custom_values'][k] rescue nil
       if !file.blank?