diff --git a/app/controllers/wechats_controller.rb b/app/controllers/wechats_controller.rb
index 30a39e86e..8570d3140 100644
--- a/app/controllers/wechats_controller.rb
+++ b/app/controllers/wechats_controller.rb
@@ -196,7 +196,7 @@ class WechatsController < ActionController::Base
 
     def login
       session[:wechat_code] = params[:code] if params[:code]
-      openid = get_openid_from_code(code)
+      openid = get_openid_from_code(params[:code])
       @wechat_user = user_binded?(openid)
 
       render 'wechats/login', layout: 'base_wechat'