diff --git a/ChangeLog b/ChangeLog
index 5f12db81a5..d81e8c6774 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sat Aug 21 20:09:43 2010  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* vm.c: add missing prototype of rb_iseq_clone for r29063.
+
 Sat Aug 21 18:54:56 2010  wanabe  <s.wanabe@gmail.com>
 
 	* vm.c (vm_define_method): copy iseq to avoid overwriting iseq->klass.
diff --git a/vm.c b/vm.c
index eb49722fcd..558e9805f6 100644
--- a/vm.c
+++ b/vm.c
@@ -1835,6 +1835,8 @@ rb_thread_alloc(VALUE klass)
     return self;
 }
 
+VALUE rb_iseq_clone(VALUE iseqval, VALUE newcbase);
+
 static void
 vm_define_method(rb_thread_t *th, VALUE obj, ID id, VALUE iseqval,
 		 rb_num_t is_singleton, NODE *cref)