diff --git a/ChangeLog b/ChangeLog
index 3be745a8bd..c494125600 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Aug 21 02:03:08 2008  Tanaka Akira  <akr@fsij.org>
+
+	* io.c (open_key_args): simplified.
+
 Thu Aug 21 01:57:03 2008  Tanaka Akira  <akr@fsij.org>
 
 	* io.c (open_key_args): IO.foreach(path, rs, limit) didn't work.
diff --git a/io.c b/io.c
index 931692025d..ca3c1d5f2e 100644
--- a/io.c
+++ b/io.c
@@ -6690,12 +6690,9 @@ open_key_args(int argc, VALUE *argv, struct foreach_arg *arg)
 	return;
     }
     v = rb_hash_aref(opt, sym_mode);
-    if (!NIL_P(v)) {
-	arg->io = rb_io_open(RSTRING_PTR(argv[0]), v, opt);
-    }
-    else {
-	arg->io = rb_io_open(RSTRING_PTR(argv[0]), INT2NUM(O_RDONLY), opt);
-    }
+    if (NIL_P(v))
+        v = INT2NUM(O_RDONLY);
+    arg->io = rb_io_open(RSTRING_PTR(argv[0]), v, opt);
 }
 
 static VALUE