diff --git a/lib/generators/active_record/two_factor_authentication_generator.rb b/lib/generators/active_record/two_factor_authentication_generator.rb
index 0fd4289..3656777 100644
--- a/lib/generators/active_record/two_factor_authentication_generator.rb
+++ b/lib/generators/active_record/two_factor_authentication_generator.rb
@@ -6,7 +6,7 @@ module ActiveRecord
       source_root File.expand_path("../templates", __FILE__)
 
       def copy_two_factor_authentication_migration
-        migration_template "migration.rb", "db/migrate/two_factor_authentication_add_to_#{table_name}"
+        migration_template "migration.rb", "db/migrate/two_factor_authentication_add_to_#{table_name}.rb"
       end
 
     end