diff --git a/ChangeLog b/ChangeLog
index 894a671f39..70d718aea1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -14,7 +14,7 @@ Sun May 29 22:44:19 2016  NARUSE, Yui  <naruse@ruby-lang.org>
 
 Sun May 29 12:08:42 2016  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
-	* ext/-test-/auto_ext.rb (auto_ext): utitily method to create
+	* ext/-test-/auto_ext.rb (auto_ext): utility method to create
 	  extension libraries for tests.
 
 Sat May 28 20:40:57 2016  Nobuyoshi Nakada  <nobu@ruby-lang.org>