diff --git a/activesupport/lib/active_support/ruby/shim.rb b/activesupport/lib/active_support/ruby/shim.rb
new file mode 100644
index 0000000000..37c57c485a
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+++ b/activesupport/lib/active_support/ruby/shim.rb
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+# Backported Ruby builtins so you can code with the latest & greatest
+# but still run on any Ruby 1.8.x.
+#
+# Date        next_year, next_month
+# DateTime    to_date, to_datetime, xmlschema
+# Enumerable  group_by, each_with_object, none?
+# Integer     even?, odd?
+# Object      tap
+# Process     Process.daemon
+# REXML       security fix
+# String      ord
+# Symbol      to_proc
+# Time        to_date, to_time, to_datetime
+require 'active_support'
+require 'active_support/core_ext/date/calculations'
+require 'active_support/core_ext/date_time/conversions'
+require 'active_support/core_ext/enumerable'
+require 'active_support/core_ext/integer/even_odd'
+require 'active_support/core_ext/object/tap'
+require 'active_support/core_ext/process/daemon'
+require 'active_support/core_ext/string/conversions'
+require 'active_support/core_ext/rexml'
+require 'active_support/core_ext/symbol/to_proc'
+require 'active_support/core_ext/time/conversions'