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diff --git a/OldMdePkg/Include/Common/FirmwareFileSystem.h b/OldMdePkg/Include/Common/FirmwareFileSystem.h
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+/** @file
+  This file defines the data structures that comprise the FFS file system.
+
+  Copyright (c) 2006, Intel Corporation                                                         
+  All rights reserved. This program and the accompanying materials                          
+  are licensed and made available under the terms and conditions of the BSD License         
+  which accompanies this distribution.  The full text of the license may be found at        
+  http://opensource.org/licenses/bsd-license.php                                            
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             
+
+  Module Name:  FirmwareFileSystem.h
+
+  @par Revision Reference:
+  These definitions are from Firmware File System Spec 0.9.
+
+**/
+
+#ifndef __EFI_FFS_FILE_SYSTEM_H__
+#define __EFI_FFS_FILE_SYSTEM_H__
+
+///
+/// FFS specific file types
+///
+#define EFI_FV_FILETYPE_FFS_PAD 0xF0
+
+//
+// FFS File Attributes
+//
+#define FFS_ATTRIB_TAIL_PRESENT     0x01
+#define FFS_ATTRIB_RECOVERY         0x02
+#define FFS_ATTRIB_HEADER_EXTENSION 0x04
+#define FFS_ATTRIB_DATA_ALIGNMENT   0x38
+#define FFS_ATTRIB_CHECKSUM         0x40
+
+///
+/// FFS_FIXED_CHECKSUM is the default checksum value used when the
+/// FFS_ATTRIB_CHECKSUM attribute bit is clear
+/// note this is NOT an architecturally defined value, but is in this file for
+/// implementation convenience
+///
+#define FFS_FIXED_CHECKSUM  0x5A
+
+//
+// File state definitions
+//
+#define EFI_FILE_HEADER_CONSTRUCTION  0x01
+#define EFI_FILE_HEADER_VALID         0x02
+#define EFI_FILE_DATA_VALID           0x04
+#define EFI_FILE_MARKED_FOR_UPDATE    0x08
+#define EFI_FILE_DELETED              0x10
+#define EFI_FILE_HEADER_INVALID       0x20
+
+#define EFI_FILE_ALL_STATE_BITS       (EFI_FILE_HEADER_CONSTRUCTION | \
+                                 EFI_FILE_HEADER_VALID | \
+                                 EFI_FILE_DATA_VALID | \
+                                 EFI_FILE_MARKED_FOR_UPDATE | \
+                                 EFI_FILE_DELETED | \
+                                 EFI_FILE_HEADER_INVALID \
+          )
+
+typedef UINT16  EFI_FFS_FILE_TAIL;
+
+///
+/// FFS file integrity check structure
+///
+typedef union {
+  struct {
+    UINT8 Header;
+    UINT8 File;
+  } Checksum;
+  UINT16  TailReference;
+} EFI_FFS_INTEGRITY_CHECK;
+
+//
+// FFS file header definition
+//
+typedef UINT8 EFI_FFS_FILE_ATTRIBUTES;
+typedef UINT8 EFI_FFS_FILE_STATE;
+
+typedef struct {
+  EFI_GUID                Name;
+  EFI_FFS_INTEGRITY_CHECK IntegrityCheck;
+  EFI_FV_FILETYPE         Type;
+  EFI_FFS_FILE_ATTRIBUTES Attributes;
+  UINT8                   Size[3];
+  EFI_FFS_FILE_STATE      State;
+} EFI_FFS_FILE_HEADER;
+
+#endif