diff --git a/db/migrate/20150820025358_about_user_activities.rb b/db/migrate/20150820025358_about_user_activities.rb
index ea98e9a32..82b58a537 100644
--- a/db/migrate/20150820025358_about_user_activities.rb
+++ b/db/migrate/20150820025358_about_user_activities.rb
@@ -32,6 +32,6 @@ class AboutUserActivities < ActiveRecord::Migration
   end
 
   def down
-
+    UserActivity.destroy_all
   end
 end