diff --git a/app/controllers/homework_common_controller.rb b/app/controllers/homework_common_controller.rb
index 18ce26c36..1b556c3c6 100644
--- a/app/controllers/homework_common_controller.rb
+++ b/app/controllers/homework_common_controller.rb
@@ -416,7 +416,7 @@ class HomeworkCommonController < ApplicationController
               unless project.nil? && project.gpid.nil?
                 project_time=project.updated_on
                 project_time=ForgeActivity.where("project_id=?",project.id).last.updated_at if ForgeActivity.where("project_id=?",project.id).last
-                if time < project_time
+                if format_time(time) < format_time(project_time)
                   time = project_time
                 end
                 begin