diff --git a/db/migrate/20170825113413_modify_support_shixuns_for_major.rb b/db/migrate/20170825113413_modify_support_shixuns_for_major.rb
index 25028fa07..f29f16808 100644
--- a/db/migrate/20170825113413_modify_support_shixuns_for_major.rb
+++ b/db/migrate/20170825113413_modify_support_shixuns_for_major.rb
@@ -2,7 +2,7 @@ class ModifySupportShixunsForMajor < ActiveRecord::Migration
   def up
     sql = "SELECT distinct(major_id) FROM `major_courses`"
     MajorCourse.find_by_sql(sql).each do |mc|
-      Major.where(:id => mc).update_column(:support_shixuns, 1)
+      Major.where(:id => mc.try(:major_id)).first.update_column(:support_shixuns, 1)
     end
   end