diff --git a/ChangeLog b/ChangeLog
index 0865018727..76f1211c56 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,7 @@
-Tue Jun 10 18:12:17 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Tue Jun 10 20:13:56 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ext/extmk.rb: negate default of --without-ext if --with-ext is
+	  given.
 
 	* ext/extmk.rb: negate default of --without-ext.
 
diff --git a/ext/extmk.rb b/ext/extmk.rb
index 8734eae00f..ab2ae4f3ee 100644
--- a/ext/extmk.rb
+++ b/ext/extmk.rb
@@ -406,8 +406,12 @@ else
       proc {|c1| w.collect {|o| o.split(/,/)}.flatten.any?(&c1)}
     end
   }
-  withes ||= proc {false}
-  withouts ||= proc {true}
+  if withes
+    withouts ||= proc {true}
+  else
+    withes = proc {false}
+    withouts ||= withes
+  end
   cond = proc {|ext, *|
     cond1 = proc {|n| File.fnmatch(n, ext)}
     withes.call(cond1) or !withouts.call(cond1)