1 files changed, 5 insertions, 2 deletions
diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec
index f5d4591d7d..dfeb075be3 100644
--- a/MdePkg/MdePkg.dec
+++ b/MdePkg/MdePkg.dec
@@ -2,7 +2,7 @@
 # This Package provides all definitions, library classes and libraries instances.
 #
 # It also provides the definitions(including PPIs/PROTOCOLs/GUIDs) of
-# EFI1.10/UEFI2.4/PI1.3 and some Industry Standards.
+# EFI1.10/UEFI2.4/PI1.4 and some Industry Standards.
 #
 # Copyright (c) 2007 - 2015, Intel Corporation. All rights reserved.<BR>
 # Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
@@ -809,7 +809,10 @@
   ## Include/Ppi/MpServices.h
   gEfiPeiMpServicesPpiGuid           = { 0xee16160a, 0xe8be, 0x47a6, { 0x82, 0xa, 0xc6, 0x90, 0xd, 0xb0, 0x25, 0xa } }
 
-
+  ## Include/Ppi/Capsule.h
+  gEfiPeiCapsulePpiGuid             = { 0x3acf33ee, 0xd892, 0x40f4, { 0xa2, 0xfc, 0x38, 0x54, 0xd2, 0xe1, 0x32, 0x3d }}
+  ## Keep name backwards compatible before PI Version 1.4
+  gPeiCapsulePpiGuid                = { 0x3acf33ee, 0xd892, 0x40f4, { 0xa2, 0xfc, 0x38, 0x54, 0xd2, 0xe1, 0x32, 0x3d }}
 
 [Protocols]
   ## Include/Protocol/Pcd.h