diff --git a/app/views/courses/_set_join.js.erb b/app/views/courses/_set_join.js.erb
index bcc094de8..a4b5dd3c6 100644
--- a/app/views/courses/_set_join.js.erb
+++ b/app/views/courses/_set_join.js.erb
@@ -5,7 +5,7 @@ $("#<%=object_id%>").replaceWith('<%= escape_javascript join_in_course_for_list(
 	<% elsif @state == 1 %>
 		alert("密码错误")
 	<% elsif @state == 2 %>
-		alert("课程已过期")
+		alert("课程已过期\n请联系课程管理员重启课程。(在配置课程处)")
 	<% else %>
 		alert("未知错误，请稍后再试")
 	<% end %>