diff --git a/ChangeLog b/ChangeLog
index 8a41947389..72718f21c4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Sat May 17 18:03:52 2008  Yuki Sonoda (Yugui) <yugui@yugui.jp>
+
+	* vm.c (Init_VM): removed the definition of Thread#initialize,
+	  which is overwritten in Init_Thread and is never used.
+
 Sat May 17 14:01:50 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* array.c (rb_ary_sort_bang): should not free shared pointer, and set
diff --git a/vm.c b/vm.c
index ca73e4cb59..f29a1e221e 100644
--- a/vm.c
+++ b/vm.c
@@ -1771,7 +1771,6 @@ Init_VM(void)
     /* ::Thread */
     rb_cThread = rb_define_class("Thread", rb_cObject);
     rb_undef_alloc_func(rb_cThread);
-    rb_define_method(rb_cThread, "initialize", ruby_thread_init, 0);
 
     /* ::VM::USAGE_ANALYSIS_* */
     rb_define_const(rb_cVM, "USAGE_ANALYSIS_INSN", rb_hash_new());