diff --git a/activerecord/lib/active_record/migration.rb b/activerecord/lib/active_record/migration.rb
index b273c33e50..4c5e1ae218 100644
--- a/activerecord/lib/active_record/migration.rb
+++ b/activerecord/lib/active_record/migration.rb
@@ -1,4 +1,5 @@
 require 'active_support/core_ext/kernel/singleton_class'
+require 'active_support/core_ext/module/aliasing'
 
 module ActiveRecord
   # Exception that can be raised to stop migrations from going backwards.