diff --git a/ChangeLog b/ChangeLog
index a18e72216b..f516098c1a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Dec 12 21:26:03 2007  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* eval_method.ci (rb_alias): no need to skip aliasing when new
+	  equals to old.  [ruby-core:13990]
+
 Wed Dec 12 16:34:53 2007  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* io.c (rb_io_check_readable): set default external encoding to
diff --git a/eval_method.ci b/eval_method.ci
index 4e07ee7d6e..8ebe252ee4 100644
--- a/eval_method.ci
+++ b/eval_method.ci
@@ -563,8 +563,6 @@ rb_alias(VALUE klass, ID name, ID def)
     st_data_t data;
 
     rb_frozen_class_p(klass);
-    if (name == def)
-	return;
     if (klass == rb_cObject) {
 	rb_secure(4);
     }