diff --git a/app/api/mobile/apis/activities.rb b/app/api/mobile/apis/activities.rb
index 94ee14a56..ae60d548a 100644
--- a/app/api/mobile/apis/activities.rb
+++ b/app/api/mobile/apis/activities.rb
@@ -33,8 +33,8 @@ module Mobile
           shield_project_ids = ShieldActivity.select("shield_id").where("container_type='User' and container_id=#{user.id} and shield_type='Project'").map(&:shield_id)
           shield_course_ids = ShieldActivity.select("shield_id").where("container_type='User' and container_id=#{user.id} and shield_type='Course'").map(&:shield_id)
           page = params[:page] ? params[:page] : 0
-          user_project_ids = (user.projects.map{|project| project.id}-shield_project_ids).empty? ? "(-1)" : "(" + (user.projects.map{|project| project.id}-shield_project_ids).join(",") + ")"
-          user_course_ids = (user.courses.map{|course| course.id}-shield_course_ids).empty? ? "(-1)" : "(" + (user.courses.map{|course| course.id}-shield_course_ids).join(",") + ")"
+          user_project_ids = (user.projects.visible.map{|project| project.id}-shield_project_ids).empty? ? "(-1)" : "(" + (user.projects.map{|project| project.id}-shield_project_ids).join(",") + ")"
+          user_course_ids = (user.courses.visible.where("is_delete = 0").map{|course| course.id}-shield_course_ids).empty? ? "(-1)" : "(" + (user.courses.map{|course| course.id}-shield_course_ids).join(",") + ")"
           course_types = "('Message','News','HomeworkCommon','Poll','Course')"
           project_types = "('Message','Issue','ProjectCreateInfo')"
           principal_types = "JournalsForMessage"