diff --git a/ChangeLog b/ChangeLog
index d698eeb044..b41ec4fd63 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Mar 13 11:11:07 2013  Shugo Maeda  <shugo@ruby-lang.org>
+
+	* object.c (Init_Object): remove Module#used, which has been
+	  introduced in Ruby 2.0 by mistake.  [Bug #7916] [ruby-core:52719]
+
 Wed Mar 13 05:49:29 2013  Eric Hodel  <drbrain@segment7.net>
 
 	* lib/irb.rb:  Fix typo
diff --git a/object.c b/object.c
index eceab5c198..94acf1721c 100644
--- a/object.c
+++ b/object.c
@@ -3030,7 +3030,6 @@ Init_Object(void)
     rb_define_private_method(rb_cModule, "included", rb_obj_dummy, 1);
     rb_define_private_method(rb_cModule, "extended", rb_obj_dummy, 1);
     rb_define_private_method(rb_cModule, "prepended", rb_obj_dummy, 1);
-    rb_define_private_method(rb_cModule, "used", rb_obj_dummy, 1);
     rb_define_private_method(rb_cModule, "method_added", rb_obj_dummy, 1);
     rb_define_private_method(rb_cModule, "method_removed", rb_obj_dummy, 1);
     rb_define_private_method(rb_cModule, "method_undefined", rb_obj_dummy, 1);