diff --git a/ChangeLog b/ChangeLog
index 5f78f0a43d..1939e02522 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Thu Dec  4 05:06:47 2008  Hidetoshi NAGAI  <nagai@ai.kyutech.ac.jp>
+
+	* ext/tk/lib/tk.rb: bug fix. use ::RubyVM instead of ::VM 
+	  [ruby-list:45676]
+
+	* ext/tk/tcltklib.c: update RELEASE_DATE
+
 Thu Dec  4 01:37:47 2008  Tadayoshi Funaba  <tadf@dotrb.org>
 
 	* complex.c (nurat_{to_s,inspect}): provides better representation
diff --git a/ext/tk/lib/tk.rb b/ext/tk/lib/tk.rb
index 67069abc32..6bc0ea63e3 100644
--- a/ext/tk/lib/tk.rb
+++ b/ext/tk/lib/tk.rb
@@ -1109,7 +1109,7 @@ module TkCore
   include TkComm
   extend TkComm
 
-  WITH_RUBY_VM  = Object.const_defined?(:VM) && ::VM.class == Class
+  WITH_RUBY_VM  = Object.const_defined?(:RubyVM) && ::RubyVM.class == Class
   WITH_ENCODING = defined?(::Encoding.default_external) && true
   #WITH_ENCODING = Object.const_defined?(:Encoding) && ::Encoding.class == Class
   #if TclTkLib::WINDOWING_SYSTEM == 'aqua'
@@ -5529,7 +5529,7 @@ TkWidget = TkWindow
 #Tk.freeze
 
 module Tk
-  RELEASE_DATE = '2008-10-20'.freeze
+  RELEASE_DATE = '2008-12-04'.freeze
 
   autoload :AUTO_PATH,        'tk/variable'
   autoload :TCL_PACKAGE_PATH, 'tk/variable'
diff --git a/ext/tk/tcltklib.c b/ext/tk/tcltklib.c
index dadab2f221..22287e8c65 100644
--- a/ext/tk/tcltklib.c
+++ b/ext/tk/tcltklib.c
@@ -4,7 +4,7 @@
  *              Oct. 24, 1997   Y. Matsumoto
  */
 
-#define TCLTKLIB_RELEASE_DATE "2008-10-20"
+#define TCLTKLIB_RELEASE_DATE "2008-12-03"
 
 #include "ruby.h"