diff --git a/MdeModulePkg/Core/Pei/Ppi/Ppi.c b/MdeModulePkg/Core/Pei/Ppi/Ppi.c
index ad77481b3b..e3a63cc12b 100644
--- a/MdeModulePkg/Core/Pei/Ppi/Ppi.c
+++ b/MdeModulePkg/Core/Pei/Ppi/Ppi.c
@@ -1038,6 +1038,7 @@ ProcessPpiListFromSec (
   EFI_STATUS              Status;
   EFI_SEC_HOB_DATA_PPI    *SecHobDataPpi;
   EFI_HOB_GENERIC_HEADER  *SecHobList;
+  PEI_CORE_INSTANCE       *PrivateData;
 
   for ( ; ;) {
     if ((PpiList->Flags & EFI_PEI_PPI_DESCRIPTOR_NOTIFY_TYPES) != 0) {
@@ -1052,6 +1053,15 @@ ProcessPpiListFromSec (
       //
       Status = InternalPeiInstallPpi (PeiServices, PpiList, TRUE);
       ASSERT_EFI_ERROR (Status);
+
+      //
+      // Set the PeiMemoryInstalled flag if SEC passed MemoryDiscoveredPpi, so the PEI runs in
+      // physical memory.
+      //
+      if (CompareGuid (PpiList->Guid, &gEfiPeiMemoryDiscoveredPpiGuid)) {
+        PrivateData                     = PEI_CORE_INSTANCE_FROM_PS_THIS (PeiServices);
+        PrivateData->PeiMemoryInstalled = TRUE;
+      }
     }
 
     if ((PpiList->Flags & EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST) == EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST) {