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diff --git a/BaseTools/Source/C/Include/Common/WorkingBlockHeader.h b/BaseTools/Source/C/Include/Common/WorkingBlockHeader.h
new file mode 100644
index 0000000000..98f8527a7b
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+++ b/BaseTools/Source/C/Include/Common/WorkingBlockHeader.h
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+/** @file
+  Defines data structure that is the headers found at the runtime
+  updatable firmware volumes, such as the FileSystemGuid of the
+  working block, the header structure of the variable block, FTW
+  working block, or event log block.
+
+  Copyright (c) 2006 - 2008, 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.
+
+  File Name: WorkingBlockHeader.h
+
+**/
+
+#ifndef __EFI_WORKING_BLOCK_HEADER_H__
+#define __EFI_WORKING_BLOCK_HEADER_H__
+
+//
+// EFI Fault tolerant working block header
+// The header is immediately followed by the write queue.
+//
+typedef struct {
+  EFI_GUID  Signature;
+  UINT32    Crc;
+  UINT8     WorkingBlockValid : 1;
+  UINT8     WorkingBlockInvalid : 1;
+#define WORKING_BLOCK_VALID   0x1
+#define WORKING_BLOCK_INVALID 0x2
+  UINT8     Reserved : 6;
+  UINT8     Reserved3[3];
+  UINT32    WriteQueueSize;
+  //
+  // UINT8                WriteQueue[WriteQueueSize];
+  //
+} EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER;
+
+#endif