diff --git a/MdePkg/Include/IndustryStandard/Pal.h b/MdePkg/Include/IndustryStandard/Pal.h
index f2601726db..c5d0f5f1f1 100644
--- a/MdePkg/Include/IndustryStandard/Pal.h
+++ b/MdePkg/Include/IndustryStandard/Pal.h
@@ -146,7 +146,6 @@ typedef struct {
 	UINT64	AliasBoundary:8;
 	UINT64	TagLsBits:8;
 	UINT64	TagMsBits:8;
-	UINT64	Reserve:8;
 } PAL_CACHE_INFO_RETURN2;
 
 /**