diff --git a/ChangeLog b/ChangeLog
index 9c57042781..af86402e16 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Apr  3 01:54:10 2002  Nobuyoshi Nakada  <nobu.nakada@nifty.ne.jp>
+
+	* ext/extmk.rb.in (enable_config): follow lib/mkmf.rb.
+
 Tue Apr  2 19:59:13 2002  Takaaki Tateishi <ttate@kt.jaist.ac.jp>
 
 	* ext/dl: Merge from rough.
diff --git a/ext/extmk.rb.in b/ext/extmk.rb.in
index 3588385877..c060d9d9dd 100644
--- a/ext/extmk.rb.in
+++ b/ext/extmk.rb.in
@@ -313,9 +313,9 @@ def with_config(config, default=nil)
 end
 
 def enable_config(config, default=nil)
-  if arg_config("--enable-"+config, default)
+  if arg_config("--enable-"+config)
     true
-  elsif arg_config("--disable-"+config, false)
+  elsif arg_config("--disable-"+config)
     false
   else
     default