diff --git a/ChangeLog b/ChangeLog
index 6f0859e78d..f27e4ed558 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Apr 23 08:39:27 2003  Nobuyoshi Nakada  <nobu.nokada@softhome.net>
+
+	* ext/zlib/extconf.rb: bccwin32 is win32 too.
+
 Tue Apr 22 20:58:00 2003  Takaaki Uematsu  <uema2x@jcom.home.ne.jp>
 
 	* ruby.c: don't call VirtualQuery in ruby_init_loadpath()
diff --git a/ext/zlib/extconf.rb b/ext/zlib/extconf.rb
index a1a28bb078..bf3349a65d 100644
--- a/ext/zlib/extconf.rb
+++ b/ext/zlib/extconf.rb
@@ -22,7 +22,7 @@ if %w'z libz zlib'.find {|z| have_library(z, 'deflateReset')} and
       os_code = 'AMIGA'
     when /\Aos2[\-_]emx\z/ then
       os_code = 'OS2'
-    when 'mswin32', 'mingw32' then
+    when 'mswin32', 'mingw32', 'bccwin32' then
       # NOTE: cygwin should be regarded as Unix.
       os_code = 'WIN32'
     else