diff --git a/MdePkg/Include/Uefi/UefiSpec.h b/MdePkg/Include/Uefi/UefiSpec.h
index 05b82e0be1..2b1b72d862 100644
--- a/MdePkg/Include/Uefi/UefiSpec.h
+++ b/MdePkg/Include/Uefi/UefiSpec.h
@@ -113,7 +113,8 @@ typedef enum {
 // Attributes bitmasks, grouped by type
 //
 #define EFI_CACHE_ATTRIBUTE_MASK (EFI_MEMORY_UC | EFI_MEMORY_WC | EFI_MEMORY_WT | EFI_MEMORY_WB | EFI_MEMORY_UCE | EFI_MEMORY_WP)
-#define EFI_MEMORY_ATTRIBUTE_MASK (EFI_MEMORY_RP | EFI_MEMORY_XP | EFI_MEMORY_RO | EFI_MEMORY_SP | EFI_MEMORY_CPU_CRYPTO)
+#define EFI_MEMORY_ACCESS_MASK (EFI_MEMORY_RP | EFI_MEMORY_XP | EFI_MEMORY_RO)
+#define EFI_MEMORY_ATTRIBUTE_MASK (EFI_MEMORY_ACCESS_MASK | EFI_MEMORY_SP | EFI_MEMORY_CPU_CRYPTO)
 
 ///
 /// Memory descriptor version number.