diff --git a/app/controllers/wechats_controller.rb b/app/controllers/wechats_controller.rb
index 78484ca7f..c2891e850 100644
--- a/app/controllers/wechats_controller.rb
+++ b/app/controllers/wechats_controller.rb
@@ -194,7 +194,7 @@ class WechatsController < ActionController::Base
     raise "课程不存在" unless course
 
     cs = CoursesService.new
-    status = cs.join_course(course.invite_code, user)
+    status = cs.join_course({invite_code: course.invite_code}, user)
     logger.info status
     if status[:state] != 0
       raise CoursesService::JoinCourseError.message(status[:state])