diff --git a/activesupport/lib/active_support.rb b/activesupport/lib/active_support.rb
index fb0cc517a5..dbf0c25c5c 100644
--- a/activesupport/lib/active_support.rb
+++ b/activesupport/lib/active_support.rb
@@ -65,6 +65,7 @@ module ActiveSupport
     autoload :MessageVerifier
     autoload :Multibyte
     autoload :OptionMerger
+    autoload :OrderedHash
     autoload :OrderedOptions
     autoload :Rescuable
     autoload :StringInquirer