diff --git a/app/controllers/wechats_controller.rb b/app/controllers/wechats_controller.rb
index 75fba6082..dc3804bf8 100644
--- a/app/controllers/wechats_controller.rb
+++ b/app/controllers/wechats_controller.rb
@@ -155,6 +155,6 @@ class WechatsController < ActionController::Base
   private
   def user_binded?
     openid = request[:FromUserName]
-    uw = UserWechat.where(:openid => open).first
+    uw = UserWechat.where(openid: openid).first
   end
 end