diff --git a/lib/delegate.rb b/lib/delegate.rb
index e709b72209..9ed1409ba0 100644
--- a/lib/delegate.rb
+++ b/lib/delegate.rb
@@ -179,17 +179,21 @@ class Delegator
   # Serialization support for the object returned by \_\_getobj\_\_.
   def marshal_dump
     [
+      :__v2__,
       instance_variables,
       instance_variables.map{|var| instance_variable_get(var)},
       __getobj__
     ]
   end
   # Reinitializes delegation from a serialized object.
-  def marshal_load(obj)
-    vars, values, obj = obj
-    vars.each_with_index{|var, i| instance_variable_set(var, values[i])}
-    initialize_methods(obj)
-    __setobj__(obj)
+  def marshal_load(data)
+    version, vars, values, obj = data
+    if version == :__v2__
+      vars.each_with_index{|var, i| instance_variable_set(var, values[i])}
+      __setobj__(obj)
+    else
+      __setobj__(data)
+    end
   end
 end