diff --git a/ChangeLog b/ChangeLog
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+Fri Nov 26 09:32:37 2010  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* vm_dump.c (dump_thread): seems to be necessary the 3rd argument of
+	  SymGetLineFromAddr64(), even though MSDN says it can be zero.
+
 Fri Nov 26 09:03:38 2010  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* regcomp.c (onig_is_prelude): added to check whether ruby is still