diff --git a/MdePkg/Include/Pi/PiHob.h b/MdePkg/Include/Pi/PiHob.h
index 4605da56e2..f730520e8c 100644
--- a/MdePkg/Include/Pi/PiHob.h
+++ b/MdePkg/Include/Pi/PiHob.h
@@ -297,6 +297,8 @@ typedef UINT32 EFI_RESOURCE_ATTRIBUTE_TYPE;
 #define EFI_RESOURCE_ATTRIBUTE_READ_ONLY_PROTECTED    0x00040000
 #define EFI_RESOURCE_ATTRIBUTE_READ_ONLY_PROTECTABLE  0x00080000
 
+#define EFI_RESOURCE_ATTRIBUTE_ENCRYPTED        0x04000000
+#define EFI_RESOURCE_ATTRIBUTE_SPECIAL_PURPOSE  0x08000000
 //
 // Physical memory relative reliability attribute. This
 // memory provides higher reliability relative to other