diff --git a/db/migrate/20160223000002_app_version_for_new_messages.rb b/db/migrate/20160223000002_app_version_for_new_messages.rb
index e0b8abb98..78280b7c2 100644
--- a/db/migrate/20160223000002_app_version_for_new_messages.rb
+++ b/db/migrate/20160223000002_app_version_for_new_messages.rb
@@ -1,3 +1,4 @@
+require 'app_version'
 class AppVersionForNewMessages < ActiveRecord::Migration
   def up
     AppVersion.set(true)