diff --git a/ChangeLog b/ChangeLog
index 8c18b84e47..1d30d69fd5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,9 @@
-Thu Jun 17 17:30:00 2010  Kenta Murata <mrkn@mrkn.jp>
+Thu Jun 17 17:32:00 2010  Kenta Murata  <mrkn@mrkn.jp>
+
+	* ext/digest/sha2/lib/sha2.rb: Darwin uses ".bundle", but not ".so",
+	  for the filename extension part of native libraries.
+
+Thu Jun 17 17:30:00 2010  Kenta Murata  <mrkn@mrkn.jp>
 
 	* ext/digest/sha2/extconf.rb: remove a check for uint64_t.
 
diff --git a/ext/digest/sha2/lib/sha2.rb b/ext/digest/sha2/lib/sha2.rb
index b8e4609478..9e91787efe 100644
--- a/ext/digest/sha2/lib/sha2.rb
+++ b/ext/digest/sha2/lib/sha2.rb
@@ -10,7 +10,11 @@
 #   $Id$
 
 require 'digest'
-require 'digest/sha2.so'
+begin
+  require 'digest/sha2.so'
+rescue LoadError
+  require 'digest/sha2.bundle'
+end
 
 module Digest
   #