diff --git a/ChangeLog b/ChangeLog
index af63af5f05..b146405faf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Mar 31 17:23:50 2014  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* test/ruby/memory_status.rb: require envutil before accessing EnvUtil
+	  module.  reported by ko1 via twitter.
+
 Mon Mar 31 10:28:01 2014  Eric Wong  <e@80x24.org>
 
 	* st.c (st_init_table_with_size): update comment
diff --git a/test/ruby/memory_status.rb b/test/ruby/memory_status.rb
index bfbfbd6e88..6a014fdf24 100644
--- a/test/ruby/memory_status.rb
+++ b/test/ruby/memory_status.rb
@@ -18,6 +18,7 @@ module Memory
     begin
       require 'fiddle/import'
     rescue LoadError
+      require_relative 'envutil'
       EnvUtil.suppress_warning do
         require 'dl/import'
       end
@@ -25,6 +26,7 @@ module Memory
     begin
       require 'fiddle/types'
     rescue LoadError
+      require_relative 'envutil'
       EnvUtil.suppress_warning do
         require 'dl/types'
       end