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diff --git a/roms/edk2/MdePkg/Include/Protocol/VariableWrite.h b/roms/edk2/MdePkg/Include/Protocol/VariableWrite.h
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+/** @file
+  Variable Write Architectural Protocol as defined in PI Specification VOLUME 2 DXE
+
+  This provides the services required to set nonvolatile environment variables.
+  This protocol must be produced by a runtime DXE driver and may be consumed only
+  by the DXE Foundation.
+
+  The DXE driver that produces this protocol must be a runtime driver. This driver
+  may update the SetVariable() field of the UEFI Runtime Services Table.
+
+  After the UEFI Runtime Services Table has been initialized, the driver must
+  install the EFI_VARIABLE_WRITE_ARCH_PROTOCOL_GUID on a new handle with a NULL
+  interface pointer. The installation of this protocol informs the DXE Foundation
+  that the write services for nonvolatile environment variables are now available
+  and that the DXE Foundation must update the 32-bit CRC of the UEFI Runtime Services
+  Table. The full complement of environment variable services are not available
+  until both this protocol and EFI_VARIABLE_ARCH_PROTOCOL are installed. DXE drivers
+  that require read-only access or read/write access to volatile environment variables
+  must have the EFI_VARIABLE_WRITE_ARCH_PROTOCOL in their dependency expressions.
+  DXE drivers that require write access to nonvolatile environment variables must
+  have this architectural protocol in their dependency expressions.
+
+  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef __ARCH_PROTOCOL_VARIABLE_WRITE_ARCH_H__
+#define __ARCH_PROTOCOL_VARIABLE_WRITE_ARCH_H__
+
+///
+/// Global ID for the Variable Write Architectural Protocol
+///
+#define EFI_VARIABLE_WRITE_ARCH_PROTOCOL_GUID \
+  { 0x6441f818, 0x6362, 0x4e44, {0xb5, 0x70, 0x7d, 0xba, 0x31, 0xdd, 0x24, 0x53 } }
+
+extern EFI_GUID gEfiVariableWriteArchProtocolGuid;
+
+#endif