@@ -38,6 +38,7 @@
 require 'chef/cookbook_version'
 require 'chef/sandbox'
 require 'chef/checksum'
+require 'chef/monkey_patches/regexp'
 
 require 'mixlib/authentication'
 
 
@@ -0,0 +1,34 @@
+# Copyright (c) 2009 Marc-Andre Lafortune
+# 
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+# 
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+# 
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+class Regexp
+  # Standard in Ruby 1.8.7+. See official documentation[http://www.ruby-doc.org/core-1.8.7/classes/Regexp.html]
+  class << self
+    unless (union(%w(a b)) rescue false)
+      alias :union_without_array_argument :union
+
+      def union(*arg)
+        return union_without_array_argument(*arg) unless arg.size == 1
+        union_without_array_argument(*arg.first)
+      end
+    end
+  end
+end