diff --git a/app/helpers/watchers_helper.rb b/app/helpers/watchers_helper.rb
index 298331c69..6d916f43e 100644
--- a/app/helpers/watchers_helper.rb
+++ b/app/helpers/watchers_helper.rb
@@ -97,7 +97,7 @@ module WatchersHelper
     return '' unless user && user.logged?
     # modify by nwb
     # 主讲教师不允许退出课程
-    return '' if user.id == course.tea_id || course.is_public == 0
+    return '' if user.id == course.tea_id
     joined = user.member_of_course?(course)
     text = joined ? l(:label_exit_course) : l(:label_new_join)
     url_t = join_path(:object_id => course.id)