diff --git a/ChangeLog b/ChangeLog
index c6939c52a5..3b3789626c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -14,7 +14,7 @@ Thu Jan 10 17:45:39 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 Thu Jan 10 16:31:20 2013  Shugo Maeda  <shugo@ruby-lang.org>
 
 	* vm_insnhelper.c (vm_search_super_method): raise a TypeError
-	  instead of a NotImplementError if self is not an instance of the
+	  instead of a NotImplementedError if self is not an instance of the
 	  current class.  [ruby-dev:39772] [Bug #2402]
 
 Thu Jan 10 16:47:18 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>