diff --git a/OvmfPkg/Library/PeilessStartupLib/Hob.c b/OvmfPkg/Library/PeilessStartupLib/Hob.c
index 5fc84a8090..630ce445eb 100644
--- a/OvmfPkg/Library/PeilessStartupLib/Hob.c
+++ b/OvmfPkg/Library/PeilessStartupLib/Hob.c
@@ -20,10 +20,9 @@
 #include <IndustryStandard/UefiTcgPlatform.h>
 #include <Library/PlatformInitLib.h>
 #include <OvmfPlatforms.h>
+#include <Pi/PrePiHob.h>
 #include "PeilessStartupInternal.h"
 
-#define EFI_RESOURCE_MEMORY_UNACCEPTED  7
-
 /**
  * Construct the HobList in SEC phase.
  *
@@ -92,7 +91,7 @@ ConstructFwHobList (
   //
   while (!END_OF_HOB_LIST (Hob)) {
     if (Hob.Header->HobType == EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) {
-      if (Hob.ResourceDescriptor->ResourceType == EFI_RESOURCE_MEMORY_UNACCEPTED) {
+      if (Hob.ResourceDescriptor->ResourceType == BZ3937_EFI_RESOURCE_MEMORY_UNACCEPTED) {
         PhysicalEnd    = Hob.ResourceDescriptor->PhysicalStart + Hob.ResourceDescriptor->ResourceLength;
         ResourceLength = Hob.ResourceDescriptor->ResourceLength;
 
diff --git a/OvmfPkg/Library/PlatformInitLib/IntelTdx.c b/OvmfPkg/Library/PlatformInitLib/IntelTdx.c
index c6d7c8bb6e..797f880df0 100644
--- a/OvmfPkg/Library/PlatformInitLib/IntelTdx.c
+++ b/OvmfPkg/Library/PlatformInitLib/IntelTdx.c
@@ -20,11 +20,11 @@
 #include <Library/PeiServicesLib.h>
 #include <Library/TdxLib.h>
 #include <Library/SynchronizationLib.h>
+#include <Pi/PrePiHob.h>
 #include <WorkArea.h>
 #include <ConfidentialComputingGuestAttr.h>
 
-#define ALIGNED_2MB_MASK                0x1fffff
-#define EFI_RESOURCE_MEMORY_UNACCEPTED  7
+#define ALIGNED_2MB_MASK  0x1fffff
 
 /**
   This function will be called to accept pages. Only BSP accepts pages.
@@ -211,7 +211,7 @@ ValidateHobList (
     EFI_RESOURCE_MEMORY_MAPPED_IO_PORT,
     EFI_RESOURCE_MEMORY_RESERVED,
     EFI_RESOURCE_IO_RESERVED,
-    EFI_RESOURCE_MEMORY_UNACCEPTED
+    BZ3937_EFI_RESOURCE_MEMORY_UNACCEPTED
   };
 
   if (VmmHobList == NULL) {
@@ -387,7 +387,7 @@ ProcessHobList (
     if (Hob.Header->HobType == EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) {
       DEBUG ((DEBUG_INFO, "\nResourceType: 0x%x\n", Hob.ResourceDescriptor->ResourceType));
 
-      if (Hob.ResourceDescriptor->ResourceType == EFI_RESOURCE_MEMORY_UNACCEPTED) {
+      if (Hob.ResourceDescriptor->ResourceType == BZ3937_EFI_RESOURCE_MEMORY_UNACCEPTED) {
         DEBUG ((DEBUG_INFO, "ResourceAttribute: 0x%x\n", Hob.ResourceDescriptor->ResourceAttribute));
         DEBUG ((DEBUG_INFO, "PhysicalStart: 0x%llx\n", Hob.ResourceDescriptor->PhysicalStart));
         DEBUG ((DEBUG_INFO, "ResourceLength: 0x%llx\n", Hob.ResourceDescriptor->ResourceLength));
@@ -488,7 +488,7 @@ TransferTdxHobList (
         ResourceType      = Hob.ResourceDescriptor->ResourceType;
         ResourceAttribute = Hob.ResourceDescriptor->ResourceAttribute;
 
-        if (ResourceType == EFI_RESOURCE_MEMORY_UNACCEPTED) {
+        if (ResourceType == BZ3937_EFI_RESOURCE_MEMORY_UNACCEPTED) {
           ResourceType       = EFI_RESOURCE_SYSTEM_MEMORY;
           ResourceAttribute |= (EFI_RESOURCE_ATTRIBUTE_PRESENT | EFI_RESOURCE_ATTRIBUTE_INITIALIZED | EFI_RESOURCE_ATTRIBUTE_TESTED);
         }