diff --git a/ChangeLog b/ChangeLog
index bee1ff3a7a..7f782c64fe 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,7 +1,10 @@
-Sun Apr 17 22:57:09 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Sun Apr 17 23:57:49 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/extmk.rb (extmake, parse_args): do not expand destdir.
 
+	* ext/extmk.rb (relative_from): treat mere drive letter as an absolute
+	  path.
+
 Sat Apr 16 17:01:16 2005  Kouhei Sutou  <kou@cozmixng.org>
 
 	* sample/rss/tdiary_plugin/rss-recent.rb (rss_recent_cache_rss):
diff --git a/ext/extmk.rb b/ext/extmk.rb
index 2342b0ce37..f5764168a2 100644
--- a/ext/extmk.rb
+++ b/ext/extmk.rb
@@ -38,7 +38,8 @@ def sysquote(x)
 end
 
 def relative_from(path, base)
-  if File.expand_path(path) == File.expand_path(path, base)
+  dir = File.join(path, "")
+  if File.expand_path(dir) == File.expand_path(dir, base)
     path
   else
     File.join(base, path)