diff --git a/activesupport/lib/active_support/core_ext/hash/conversions.rb b/activesupport/lib/active_support/core_ext/hash/conversions.rb
index be0012ad45..7e843cb7dc 100644
--- a/activesupport/lib/active_support/core_ext/hash/conversions.rb
+++ b/activesupport/lib/active_support/core_ext/hash/conversions.rb
@@ -1,3 +1,5 @@
+require 'date'
+
 module ActiveSupport #:nodoc:
   module CoreExtensions #:nodoc:
     module Hash #:nodoc: