diff --git a/ChangeLog b/ChangeLog
index b386de37a6..8f4b87658c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Fri Apr 17 00:53:47 2009  Yusuke Endoh  <mame@tsg.ne.jp>
+
+	* lib/cgi/core.rb (read_multipart): When path is not defined,
+	  define local_path as a method always returning nil instead of
+	  aliasing.  This is because StringIO#path no longer exists.
+
 Fri Apr 17 00:45:09 2009  Yusuke Endoh  <mame@tsg.ne.jp>
 
 	* dir.c (bracket): fix escape handling for range character in bracket
diff --git a/lib/cgi/core.rb b/lib/cgi/core.rb
index 69c7f28603..4ca0bcf050 100644
--- a/lib/cgi/core.rb
+++ b/lib/cgi/core.rb
@@ -440,7 +440,13 @@ class CGI
         ## create body (StringIO or Tempfile)
         body = create_body(bufsize < content_length)
         class << body
-          alias local_path path
+          if method_defined?(:path)
+            alias local_path path
+          else
+            def local_path
+              nil
+            end
+          end
           attr_reader :original_filename, :content_type
         end
         ## find head and boundary