diff --git a/lib/fluent/output.rb b/lib/fluent/output.rb
index 75cd27f9bf..da829c0335 100644
--- a/lib/fluent/output.rb
+++ b/lib/fluent/output.rb
@@ -21,6 +21,7 @@
 require 'fluent/engine'
 require 'fluent/log'
 require 'fluent/plugin'
+require 'fluent/status'
 require 'fluent/timezone'
 
 module Fluent