diff --git a/MdeModulePkg/Core/Dxe/Misc/MemoryAttributesTable.c b/MdeModulePkg/Core/Dxe/Misc/MemoryAttributesTable.c
index e079213711..82fa026bce 100644
--- a/MdeModulePkg/Core/Dxe/Misc/MemoryAttributesTable.c
+++ b/MdeModulePkg/Core/Dxe/Misc/MemoryAttributesTable.c
@@ -182,7 +182,7 @@ InstallMemoryAttributesTable (
   MemoryAttributesTable->Version         = EFI_MEMORY_ATTRIBUTES_TABLE_VERSION;
   MemoryAttributesTable->NumberOfEntries = RuntimeEntryCount;
   MemoryAttributesTable->DescriptorSize  = (UINT32)DescriptorSize;
-  MemoryAttributesTable->Reserved        = 0;
+  MemoryAttributesTable->Flags           = 0;
   DEBUG ((DEBUG_VERBOSE, "MemoryAttributesTable:\n"));
   DEBUG ((DEBUG_VERBOSE, "  Version              - 0x%08x\n", MemoryAttributesTable->Version));
   DEBUG ((DEBUG_VERBOSE, "  NumberOfEntries      - 0x%08x\n", MemoryAttributesTable->NumberOfEntries));
diff --git a/MdePkg/Include/Guid/MemoryAttributesTable.h b/MdePkg/Include/Guid/MemoryAttributesTable.h
index 82f83a67b9..238c14ff92 100644
--- a/MdePkg/Include/Guid/MemoryAttributesTable.h
+++ b/MdePkg/Include/Guid/MemoryAttributesTable.h
@@ -17,11 +17,15 @@ typedef struct {
   UINT32    Version;
   UINT32    NumberOfEntries;
   UINT32    DescriptorSize;
-  UINT32    Reserved;
+  UINT32    Flags;
   // EFI_MEMORY_DESCRIPTOR Entry[1];
 } EFI_MEMORY_ATTRIBUTES_TABLE;
 
-#define EFI_MEMORY_ATTRIBUTES_TABLE_VERSION  0x00000001
+#define EFI_MEMORY_ATTRIBUTES_TABLE_VERSION  0x00000002
+
+#define EFI_MEMORY_ATTRIBUTES_FLAGS_RT_FORWARD_CONTROL_FLOW_GUARD  0x1
+// BIT0 implies that Runtime code includes the forward control flow guard
+// instruction, such as X86 CET-IBT or ARM BTI.
 
 extern EFI_GUID  gEfiMemoryAttributesTableGuid;