diff --git a/ChangeLog b/ChangeLog
index 7fa28a58ef..829aa472a3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Aug 20 18:37:20 2008  Tanaka Akira  <akr@fsij.org>
+
+	* io.c (open_key_args): meaningless MEMCPY removed.
+
 Wed Aug 20 18:30:58 2008  Tanaka Akira  <akr@fsij.org>
 
 	* io.c (prep_io) [cygwin]: use FMODE_BINMODE instead of O_BINARY.
diff --git a/io.c b/io.c
index 53d6bcb136..3f67d8093c 100644
--- a/io.c
+++ b/io.c
@@ -6649,7 +6649,6 @@ open_key_args(int argc, VALUE *argv, struct foreach_arg *arg)
 	args = rb_ary_new2(RARRAY_LEN(v)+1);
 	rb_ary_push(args, argv[0]);
 	rb_ary_concat(args, v);
-	MEMCPY(RARRAY_PTR(args)+1, RARRAY_PTR(v), VALUE, RARRAY_LEN(v));
 
 	arg->io = rb_io_open_with_args(RARRAY_LEN(args), RARRAY_PTR(args));
 	return;