diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index 48098e9d2..00c7d9557 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -176,7 +176,8 @@ class UsersController < ApplicationController
     @memberships_doing = []
     @memberships_done  = []
     now_time = Time.now
-    @memberships.map { |e| 
+    @memberships.map { |e|
+      (@memberships_doing.push(e);next) if e.project.course_extra.endup_time.nil?
       end_time_str = e.project.course_extra.endup_time
       end_time = Time.parse(end_time_str)
       if end_time > now_time