diff --git a/ChangeLog b/ChangeLog
index e20f3ab103..89f4b9b3c9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Mon Jun  2 16:26:17 2008  Akinori MUSHA  <knu@iDaemons.org>
+
+	* lib/delegate.rb (Delegator::MethodDelegation#respond_to):
+	  respond_to? should now take optional second argument; submitted
+	  by Jeremy Kemper <jeremy at bitsweat.net> in [ruby-core:17045].
+
 Mon Jun  2 16:14:18 2008  Akinori MUSHA  <knu@iDaemons.org>
 
 	* lib/erb.rb (ERB::Compiler::TrimScanner#scan_line): Oops.  This
diff --git a/lib/delegate.rb b/lib/delegate.rb
index c50eac2f61..337e763f62 100644
--- a/lib/delegate.rb
+++ b/lib/delegate.rb
@@ -152,9 +152,9 @@ class Delegator
     # Checks for a method provided by this the delegate object by fowarding the 
     # call through \_\_getobj\_\_.
     # 
-    def respond_to?(m)
+    def respond_to?(m, include_private = false)
       return true if super
-      return self.__getobj__.respond_to?(m)
+      return self.__getobj__.respond_to?(m, include_private)
     end
 
     #