diff --git a/ChangeLog b/ChangeLog
index 032e75d334..381113c874 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Jan  9 19:58:56 2006  arton  <artonx@yahoo.co.jp>
+
+	* ext/zlib/extconf.rb: zlib compiled DLL version 1.2.3 distributed by
+	  http://www.zlib.net/ has zdll.lib. [ruby-dev:28209]
+
 Mon Jan  9 14:25:00 2006  Hirokazu Yamamoto  <ocean@m2.ccsnet.ne.jp>
 
 	* win32/Makefile.sub (OPTFLAGS): I have experienced trouble on y- flag,
diff --git a/ext/zlib/extconf.rb b/ext/zlib/extconf.rb
index bf3349a65d..6b9bb05742 100644
--- a/ext/zlib/extconf.rb
+++ b/ext/zlib/extconf.rb
@@ -10,7 +10,7 @@ require 'rbconfig'
 dir_config 'zlib'
 
 
-if %w'z libz zlib'.find {|z| have_library(z, 'deflateReset')} and
+if %w'z libz zlib zdll'.find {|z| have_library(z, 'deflateReset')} and
     have_header('zlib.h') then
 
   defines = []