diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index 58a9ac488..18e8a160d 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -940,7 +940,7 @@ class CoursesController < ApplicationController
               ApplyTeacherRoleJoinCourseNotifyJob.perform_later(current_user.id, course.id, role)
               # message = "#{course_message.content == 2 ? '教师' : '助教'}申请已提交，请等待审核"
             else
-              message = "#{existing_course_message.content == 2 ? '教师' : '助教'}申请已提交，请等待审核"
+              message = "#{existing_course_message.content == '2' ? '教师' : '助教'}申请已提交，请等待审核"
             end
           else
             message = "您已是课堂成员"