diff --git a/ChangeLog b/ChangeLog
index 6e0a0db9b3..acd8e51402 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Aug 21 01:31:34 2008  Tanaka Akira  <akr@fsij.org>
+
+	* io.c (rb_file_sysopen_internal): unused function removed.
+	  (rb_file_sysopen): ditto.
+
 Thu Aug 21 01:09:26 2008  Tanaka Akira  <akr@fsij.org>
 
 	* io.c: use mode_t for the 3rd argument, permission, of open(2).
diff --git a/io.c b/io.c
index 24c1a62c42..880b3dc8a2 100644
--- a/io.c
+++ b/io.c
@@ -3988,18 +3988,6 @@ rb_file_open(const char *fname, const char *mode)
     return rb_file_open_internal(io_alloc(rb_cFile), fname, mode);
 }
 
-static VALUE
-rb_file_sysopen_internal(VALUE io, const char *fname, int modenum, mode_t perm)
-{
-    return rb_file_open_generic(io, fname, modenum, rb_io_modenum_flags(modenum), NULL, perm);
-}
-
-VALUE
-rb_file_sysopen(const char *fname, int modenum, mode_t perm)
-{
-    return rb_file_sysopen_internal(io_alloc(rb_cFile), fname, modenum, perm);
-}
-
 #if defined(__CYGWIN__) || !defined(HAVE_FORK)
 static struct pipe_list {
     rb_io_t *fptr;
@@ -4787,7 +4775,7 @@ rb_io_open(const char *fname, VALUE mode, VALUE opt)
 
     if (fname[0] == '|') {
 	VALUE cmd = rb_str_new2(fname+1);
-	return pipe_open_s(cmd, rb_io_modenum_mode(modenum));
+	return pipe_open_s(cmd, rb_io_modenum_mode(modenum)); /* xxx: convconfig ignored */
     }
     else {
         return rb_file_open_generic(io_alloc(rb_cFile), fname,