diff --git a/ChangeLog b/ChangeLog
index a7319683b0..31101ef078 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Dec 25 20:01:50 2008  Tanaka Akira  <akr@fsij.org>
+
+	* io.c (rb_io_s_pipe): unused variable removed.
+
 Thu Dec 25 19:35:51 2008  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* transcode.c (sym_ignore): remove useless symbol.
diff --git a/io.c b/io.c
index a74bc199e4..1287d94f5e 100644
--- a/io.c
+++ b/io.c
@@ -7076,7 +7076,6 @@ rb_io_s_pipe(int argc, VALUE *argv, VALUE klass)
     rb_io_t *fptr, *fptr2;
     int fmode = 0;
     VALUE ret;
-    VALUE rw[2];
 
     opt = pop_last_hash(&argc, argv);
     rb_scan_args(argc, argv, "02", &v1, &v2);
@@ -7110,8 +7109,6 @@ rb_io_s_pipe(int argc, VALUE *argv, VALUE klass)
     fptr2->mode |= fmode;
 
     ret = rb_assoc_new(r, w);
-    rw[0] = r;
-    rw[1] = w;
     if (rb_block_given_p()) {
 	return rb_ensure(pipe_yield, ret, io_close, r);
     }