diff --git a/ChangeLog b/ChangeLog
index 973b4fbb20..f0ff5802be 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,7 +1,7 @@
 Fri Jan 17 20:05:02 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* lib/delegate.rb (Delegator): keep source information methods
-	  which start and end with '__'.  [ruby-core:58572] [Bug #9155]
+	  which start and end with '__'.  [ruby-core:59718] [Bug #9403]
 
 Fri Jan 17 17:58:04 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>