diff --git a/MdePkg/Include/ConfidentialComputingGuestAttr.h b/MdePkg/Include/ConfidentialComputingGuestAttr.h
index dd2541c6dc..44e6df8002 100644
--- a/MdePkg/Include/ConfidentialComputingGuestAttr.h
+++ b/MdePkg/Include/ConfidentialComputingGuestAttr.h
@@ -1,5 +1,5 @@
 /** @file
-Definitions for Confidential Computing Attribute
+Definitions for Confidential Computing Guest Attributes
 
 Copyright (c) 2021 AMD Inc. All rights reserved.<BR>
 SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -9,6 +9,15 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 #ifndef CONFIDENTIAL_COMPUTING_GUEST_ATTR_H_
 #define CONFIDENTIAL_COMPUTING_GUEST_ATTR_H_
 
+//
+// Confidential computing guest type
+//
+typedef enum {
+  CcGuestTypeNonEncrypted = 0,
+  CcGuestTypeAmdSev,
+  CcGuestTypeIntelTdx,
+} CC_GUEST_TYPE;
+
 typedef enum {
   /* The guest is running with memory encryption disabled. */
   CCAttrNotEncrypted = 0,