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diff --git a/MdeModulePkg/Library/LzmaCustomDecompressLib/LzmaDecompressLibInternal.h b/MdeModulePkg/Library/LzmaCustomDecompressLib/LzmaDecompressLibInternal.h
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+++ b/MdeModulePkg/Library/LzmaCustomDecompressLib/LzmaDecompressLibInternal.h
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+/** @file
+  LZMA Decompress Library internal header file declares Lzma decompress interfaces.
+
+  Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>
+  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.
+
+**/
+
+#ifndef __LZMADECOMPRESSLIB_INTERNAL_H__
+#define __LZMADECOMPRESSLIB_INTERNAL_H__
+
+#include <PiPei.h>
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/ExtractGuidedSectionLib.h>
+#include <Guid/LzmaDecompress.h>
+
+/**
+  Given a Lzma compressed source buffer, this function retrieves the size of 
+  the uncompressed buffer and the size of the scratch buffer required 
+  to decompress the compressed source buffer.
+
+  Retrieves the size of the uncompressed buffer and the temporary scratch buffer 
+  required to decompress the buffer specified by Source and SourceSize.
+  The size of the uncompressed buffer is returned in DestinationSize, 
+  the size of the scratch buffer is returned in ScratchSize, and RETURN_SUCCESS is returned.
+  This function does not have scratch buffer available to perform a thorough 
+  checking of the validity of the source data. It just retrieves the "Original Size"
+  field from the LZMA_HEADER_SIZE beginning bytes of the source data and output it as DestinationSize.
+  And ScratchSize is specific to the decompression implementation.
+
+  If SourceSize is less than LZMA_HEADER_SIZE, then ASSERT().
+
+  @param  Source          The source buffer containing the compressed data.
+  @param  SourceSize      The size, in bytes, of the source buffer.
+  @param  DestinationSize A pointer to the size, in bytes, of the uncompressed buffer
+                          that will be generated when the compressed buffer specified
+                          by Source and SourceSize is decompressed.
+  @param  ScratchSize     A pointer to the size, in bytes, of the scratch buffer that
+                          is required to decompress the compressed buffer specified 
+                          by Source and SourceSize.
+
+  @retval  RETURN_SUCCESS The size of the uncompressed data was returned 
+                          in DestinationSize and the size of the scratch 
+                          buffer was returned in ScratchSize.
+
+**/
+RETURN_STATUS
+EFIAPI
+LzmaUefiDecompressGetInfo (
+  IN  CONST VOID  *Source,
+  IN  UINT32      SourceSize,
+  OUT UINT32      *DestinationSize,
+  OUT UINT32      *ScratchSize
+  );
+
+/**
+  Decompresses a Lzma compressed source buffer.
+
+  Extracts decompressed data to its original form.
+  If the compressed source data specified by Source is successfully decompressed 
+  into Destination, then RETURN_SUCCESS is returned.  If the compressed source data 
+  specified by Source is not in a valid compressed data format,
+  then RETURN_INVALID_PARAMETER is returned.
+
+  @param  Source      The source buffer containing the compressed data.
+  @param  SourceSize  The size of source buffer.
+  @param  Destination The destination buffer to store the decompressed data
+  @param  Scratch     A temporary scratch buffer that is used to perform the decompression.
+                      This is an optional parameter that may be NULL if the 
+                      required scratch buffer size is 0.
+                     
+  @retval  RETURN_SUCCESS Decompression completed successfully, and 
+                          the uncompressed buffer is returned in Destination.
+  @retval  RETURN_INVALID_PARAMETER 
+                          The source buffer specified by Source is corrupted 
+                          (not in a valid compressed format).
+**/
+RETURN_STATUS
+EFIAPI
+LzmaUefiDecompress (
+  IN CONST VOID  *Source,
+  IN UINTN       SourceSize,
+  IN OUT VOID    *Destination,
+  IN OUT VOID    *Scratch
+  );
+
+#endif
+