diff --git a/MdePkg/Include/Library/HobLib.h b/MdePkg/Include/Library/HobLib.h
index a92d37ad05..278133d991 100644
--- a/MdePkg/Include/Library/HobLib.h
+++ b/MdePkg/Include/Library/HobLib.h
@@ -425,7 +425,6 @@ BuildMemoryAllocationHob (
   @return HobType
   
 **/
-//#define GET_HOB_TYPE(Hob)     ((Hob).Header->HobType)
 #define GET_HOB_TYPE(HobStart) \
   ((*(EFI_HOB_GENERIC_HEADER **)&(HobStart))->HobType)
 
@@ -440,7 +439,6 @@ BuildMemoryAllocationHob (
   @return HobLength
 
 **/
-//#define GET_HOB_LENGTH(Hob)   ((Hob).Header->HobLength)
 #define GET_HOB_LENGTH(HobStart) \
   ((*(EFI_HOB_GENERIC_HEADER **)&(HobStart))->HobLength)
 
@@ -455,7 +453,6 @@ BuildMemoryAllocationHob (
   @return A pointer to the next HOB in the HOB list.
 
 **/
-//#define GET_NEXT_HOB(Hob)     ((Hob).Raw + GET_HOB_LENGTH (Hob))
 #define GET_NEXT_HOB(HobStart) \
   (VOID *)(*(UINT8 **)&(HobStart) + GET_HOB_LENGTH (HobStart))
 
@@ -485,7 +482,6 @@ BuildMemoryAllocationHob (
   @return  A pointer to the data buffer in a HOB
   
 **/
-//#define GET_GUID_HOB_DATA(GuidHob)      ((VOID *) (((UINT8 *) &((GuidHob)->Name)) + sizeof (EFI_GUID)))
 #define GET_GUID_HOB_DATA(HobStart) \
   (VOID *)(*(UINT8 **)&(HobStart) + sizeof (EFI_HOB_GUID_TYPE))
 
@@ -499,7 +495,6 @@ BuildMemoryAllocationHob (
 
   @return  The size of the data buffer
 **/
-//#define GET_GUID_HOB_DATA_SIZE(GuidHob) (((GuidHob)->Header).HobLength - sizeof (EFI_HOB_GUID_TYPE))
 #define GET_GUID_HOB_DATA_SIZE(HobStart) \
   (UINT16)(GET_HOB_LENGTH (HobStart) - sizeof (EFI_HOB_GUID_TYPE))