1 files changed, 6 insertions, 1 deletions
diff --git a/MdePkg/Include/IndustryStandard/AcpiAml.h b/MdePkg/Include/IndustryStandard/AcpiAml.h
index 74622e912e..4255ca3d70 100644
--- a/MdePkg/Include/IndustryStandard/AcpiAml.h
+++ b/MdePkg/Include/IndustryStandard/AcpiAml.h
@@ -2,7 +2,7 @@
   This file contains AML code definition in the latest ACPI spec.
 
   Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
-  Copyright (c) 2019, ARM Limited. All rights reserved.<BR>
+  Copyright (c) 2019 - 2021, Arm Limited. All rights reserved.<BR>
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
 **/
@@ -176,4 +176,9 @@
 #define AML_FIELD_CONNECTION_OP      0x02
 #define AML_FIELD_EXT_ACCESS_OP      0x03
 
+//
+// AML Name segment definitions
+//
+#define AML_NAME_SEG_SIZE            4
+
 #endif