diff --git a/ChangeLog b/ChangeLog
index 6f917ee272..f22ddb74c9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri May  9 03:59:06 2014  Ayumu AIZAWA  <ayumu.aizawa@gmail.com>
+
+	* lib/delegate.rb: Fix example of using delegator.
+	  patched from Andrey Koleshko. [Fixes GH-505]
+
 Fri May  9 03:42:43 2014  Ayumu AIZAWA  <ayumu.aizawa@gmail.com>
 
 	* lib/shell.rb: add documentation in lib/shell.rb
diff --git a/lib/delegate.rb b/lib/delegate.rb
index d7902292f0..cdb525844c 100644
--- a/lib/delegate.rb
+++ b/lib/delegate.rb
@@ -248,7 +248,7 @@ end
 #
 #   class User
 #     def born_on
-#       Date.new(1989, 09, 10)
+#       Date.new(1989, 9, 10)
 #     end
 #   end
 #