diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec
index 8ab3e1cfca..b85749a880 100644
--- a/MdePkg/MdePkg.dec
+++ b/MdePkg/MdePkg.dec
@@ -5,7 +5,8 @@
 # It also provides the definitions(including PPIs/PROTOCOLs/GUIDs) of
 # EFI1.10/UEFI2.0/UEFI2.1/PI1.0 and some Industry Standards.
 #
-# Copyright (c) 2007 - 2009, Intel Corporation.
+# Copyright (c) 2007 - 2009, Intel Corporation.<BR>
+# Portions Copyright (c) 2008-2009 Apple Inc.<BR>
 #
 # All rights reserved.
 # This program and the accompanying materials are licensed and made available under
@@ -29,7 +30,7 @@
 [Includes]
   Include
 
-[Includes.Ia32]
+[Includes.IA32]
   Include/Ia32
 
 [Includes.X64]
@@ -41,6 +42,9 @@
 [Includes.EBC]
   Include/Ebc
 
+[Includes.ARM]
+  Include/Arm
+
 [LibraryClasses]
   ##  @libraryclass  Provides most usb APIs to support the Hid requests defined in Usb Hid 1.1 spec
   #                  and the standard requests defined in Usb 1.1 spec.