diff --git a/app/models/course.rb b/app/models/course.rb
index ef42d91e8..196e7168d 100644
--- a/app/models/course.rb
+++ b/app/models/course.rb
@@ -36,7 +36,7 @@ class Course < ActiveRecord::Base
   acts_as_attachable :view_permission => :view_course_files,
                      :delete_permission => :manage_files
 
-  validates_presence_of :password, :term,:name,:description
+  validates_presence_of :password, :term,:name
   validates_format_of  :class_period, :with =>/^[1-9]\d*$/
   validates_format_of  :name,:with =>/^[a-zA-Z0-9_\u4e00-\u9fa5]+$/
   validates_length_of :description, :maximum => 10000