diff --git a/ChangeLog b/ChangeLog
index 840416fa94..c6b57085bb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Oct  6 21:43:03 2014  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* error.c: update exception tree. [DOC]
+	  reported by @hemge via twitter.
+
 Mon Oct  6 18:43:03 2014  Rei Odaira  <Rei.Odaira@gmail.com>
 
 	* configure.in: Fix typo. [Bug #9914]
diff --git a/error.c b/error.c
index d084bb3e8a..8b5d9a15fb 100644
--- a/error.c
+++ b/error.c
@@ -1793,14 +1793,18 @@ syserr_eqq(VALUE self, VALUE exc)
  *    * LoadError
  *    * NotImplementedError
  *    * SyntaxError
+ *  * SecurityError
  *  * SignalException
  *    * Interrupt
  *  * StandardError -- default for +rescue+
  *    * ArgumentError
- *    * IndexError
- *      * StopIteration
+ *    * EncodingError
+ *    * FiberError
  *    * IOError
  *      * EOFError
+ *    * IndexError
+ *      * KeyError
+ *      * StopIteration
  *    * LocalJumpError
  *    * NameError
  *      * NoMethodError
@@ -1808,14 +1812,13 @@ syserr_eqq(VALUE self, VALUE exc)
  *      * FloatDomainError
  *    * RegexpError
  *    * RuntimeError -- default for +raise+
- *    * SecurityError
  *    * SystemCallError
  *      * Errno::*
- *    * SystemStackError
  *    * ThreadError
  *    * TypeError
  *    * ZeroDivisionError
  *  * SystemExit
+ *  * SystemStackError
  *  * fatal -- impossible to rescue
  */