diff --git a/ChangeLog b/ChangeLog
index a829aee36f..9f968f4746 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri May 30 06:09:31 2008  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* enc/utf_8.c: add UTF8-MAC (UTF-8-MAC).
+
 Fri May 30 04:17:13 2008  Akinori MUSHA  <knu@iDaemons.org>
 
 	* enum.c (enum_count, count_all_i, Init_Enumerable),
diff --git a/enc/utf_8.c b/enc/utf_8.c
index 3a287b3e28..4eaf6a21e7 100644
--- a/enc/utf_8.c
+++ b/enc/utf_8.c
@@ -443,3 +443,13 @@ OnigEncodingDefine(utf_8, UTF_8) = {
   onigenc_always_true_is_allowed_reverse_match
 };
 ENC_ALIAS("CP65001", "UTF-8");
+
+/*
+ * Name: UTF8-MAC
+ * Link: http://developer.apple.com/documentation/MacOSX/Conceptual/BPFileSystem/BPFileSystem.html
+ * Link: http://developer.apple.com/qa/qa2001/qa1235.html
+ * Link: http://developer.apple.com/jp/qa/qa2001/qa1235.html
+ */
+ENC_REPLICATE("UTF8-MAC", "UTF-8");
+ENC_ALIAS("UTF-8-MAC", "UTF8-MAC");
+