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diff --git a/ChangeLog b/ChangeLog
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 Sun Sep 11 19:06:49 2016  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* win32/win32.c (rb_w32_write_console): should set writen length as the
-	  return value.
+	  return value.  [Bug #12748] [ruby-dev:49786]
 
 Fri Sep  9 22:43:29 2016  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>