diff --git a/db/migrate/20150514132606_add_registrant_ident_to_users.rb b/db/migrate/20150514132606_add_registrant_ident_to_users.rb
index 3f9b1389f..f07c88e72 100644
--- a/db/migrate/20150514132606_add_registrant_ident_to_users.rb
+++ b/db/migrate/20150514132606_add_registrant_ident_to_users.rb
@@ -1,5 +1,6 @@
 class AddRegistrantIdentToUsers < ActiveRecord::Migration
   def change
     add_column :users, :registrant_ident, :string
+    add_index :users, :registrant_ident
   end
 end