diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index 0d6d9614b..5d0403099 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -354,7 +354,7 @@ class UsersController < ApplicationController
       homework_detail_manual.comment_status = 1
       homework_detail_manual.evaluation_start = Time.now
       homework_detail_manual.evaluation_end = Time.now
-      homework_detail_manual.evaluation_num = params[:evaluation_num]
+      homework_detail_manual.evaluation_num = params[:evaluation_num] || 3
       homework_detail_manual.absence_penalty = 0
       homework.homework_detail_manual = homework_detail_manual