diff --git a/lib/bson/ordered_hash.rb b/lib/bson/ordered_hash.rb
index ed22e65..2bce466 100644
--- a/lib/bson/ordered_hash.rb
+++ b/lib/bson/ordered_hash.rb
@@ -88,7 +88,7 @@ module BSON
         @ordered_keys ||= []
         @ordered_keys.map { |k| [k, self[k]] }      
       end
-    
+
       def values
         collect { |k, v| v }
       end
@@ -158,6 +158,9 @@ module BSON
         end
       end
 
+      def clone
+        Marshal::load(Marshal.dump(self))
+      end
     end
   end
 end
diff --git a/test/mongo_bson/ordered_hash_test.rb b/test/mongo_bson/ordered_hash_test.rb
index e059b35..0171c3d 100644
--- a/test/mongo_bson/ordered_hash_test.rb
+++ b/test/mongo_bson/ordered_hash_test.rb
@@ -187,4 +187,11 @@ class OrderedHashTest < Test::Unit::TestCase
     assert !new.keys.include?('z')
   end
 
+  def test_clone
+    copy = @oh.clone
+    assert copy.keys == @oh.keys
+
+    copy[:foo] = 1
+    assert copy.keys != @oh.keys
+  end
 end