Index: lib/delegate.rb
===================================================================
--- lib/delegate.rb	(revision 15376)
+++ lib/delegate.rb	(working copy)
@@ -117,7 +117,7 @@
 class Delegator
   preserved = [
     :__id__, :object_id, :__send__, :public_send, :respond_to?, :send,
-    :instance_eval, :instance_exec, :extend,
+    :instance_eval, :instance_exec, :extend, :class,
   ]
   instance_methods.each do |m|
     next if preserved.include?(m)