diff --git a/ChangeLog b/ChangeLog
index 1b01b50b03..9040e045c3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Jan 15 11:40:44 2009  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* io.c (pipe_open): revert a part of previous commit. it may be a
+	  mistake.
+
 Thu Jan 15 10:45:52 2009  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* symbian/README.SYMBIAN: symbian support added.  great appreciate
diff --git a/io.c b/io.c
index a70baf8edf..14fb46bcdc 100644
--- a/io.c
+++ b/io.c
@@ -4479,12 +4479,9 @@ pipe_open(struct rb_exec_arg *eargp, VALUE prog, const char *modestr, int fmode,
     int status;
     struct popen_arg arg;
     char errmsg[80] = { '\0' };
-#else    
-#if defined(_WIN32)
-    int openmode = rb_io_modestr_oflags(modestr);
-    const char *exename = NULL;
-    volatile VALUE cmdbuf;
-#endif    
+#elif defined(_WIN32)
+    volatile VALUE argbuf;
+    char **args = NULL;
     struct rb_exec_arg sarg;
     int pair[2], write_pair[2];
 #endif