diff --git a/ChangeLog b/ChangeLog
index 173fbfb50b..10a2418887 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Dec 28 01:45:12 2010  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
+
+	* NEWS: Add Zlib.deflate and Zlib.inflate.
+	  [ruby-dev:42833]
+
 Mon Dec 27 21:22:33 2010  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
 
 	* win32/configure.bat: Remove obsoleted conding rule. Now, we
@@ -18,7 +23,7 @@ Mon Dec 27 12:14:46 2010  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 Mon Dec 27 10:33:43 2010  NARUSE, Yui  <naruse@ruby-lang.org>
 
-	* ext/zlib/zlib.c (Init_zlib): Add Zlib.defale and Zlib.inflate.
+	* ext/zlib/zlib.c (Init_zlib): Add Zlib.deflate and Zlib.inflate.
 	  [ruby-dev:42833]
 
 Mon Dec 27 07:38:07 2010  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
diff --git a/NEWS b/NEWS
index b32e533a14..9d26d45c34 100644
--- a/NEWS
+++ b/NEWS
@@ -104,6 +104,11 @@ with all sufficient information, see the ChangeLog file.
   * new logging directive:
     * %{remote}p for remote (client) port number.
 
+* zlib
+  * new methods:
+    * Zlib.deflate
+    * Zlib.inflate
+
 === Language changes
 
 * Regexps now support Unicode 6.0. (new characters and scripts)