diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index e6171bf81..d770a4633 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -446,12 +446,13 @@ class UsersController < ApplicationController
         activity = Activity.where(where_condition).where('user_id = ?', @user.id).order('id desc')
       end
       activity = activity.reject { |e|
-        !User.current.admin? &&
+            e.act.nil? ||
+            (!User.current.admin? && !e.act.nil?
             (((e.act_type == "Issue") && !e.act.project.visible?(User.current)) ||
                 (e.act_type == "Bid" && !e.act.courses.first.nil? && e.act.courses.first.is_public == 0 && !User.current.member_of_course?(e.act.courses.first)) ||
                 (e.act_type == "Journal" && e.act.respond_to?("Project") && !e.act.project.visible?(User.current)) ||
                 (e.act_type == "News" && ((!e.act.project.nil? && !e.act.project.visible?(User.current)) || (!e.act.course.nil? && e.act.course.is_public == 0 && !User.current.member_of_course?(e.act.course)))) ||
-                (e.act_type == "Message" && !e.act.board.nil? && ((!e.act.board.project.nil? && !e.act.board.project.visible?(User.current)) || (!e.act.board.course.nil? && e.act.board.course.is_public == 0 && !User.current.member_of_course?(e.act.board.course)))))
+                (e.act_type == "Message" && !e.act.board.nil? && ((!e.act.board.project.nil? && !e.act.board.project.visible?(User.current)) || (!e.act.board.course.nil? && e.act.board.course.is_public == 0 && !User.current.member_of_course?(e.act.board.course))))))
       }
       @activity_count = activity.count
       @activity_pages = Paginator.new @activity_count, pre_count, params['page']