diff --git a/MdePkg/Include/Uefi/UefiBaseType.h b/MdePkg/Include/Uefi/UefiBaseType.h
index d14215619f..43814b9d06 100644
--- a/MdePkg/Include/Uefi/UefiBaseType.h
+++ b/MdePkg/Include/Uefi/UefiBaseType.h
@@ -162,18 +162,7 @@ typedef union {
 
 #define EFI_ERROR(A)              RETURN_ERROR(A)
 
-//
-// Define macros to build data structure signatures from characters.
-//
-#define EFI_SIGNATURE_16(A, B)                    SIGNATURE_16 (A, B)
-#define EFI_SIGNATURE_32(A, B, C, D)              SIGNATURE_32 (A, B, C, D)
-#define EFI_SIGNATURE_64(A, B, C, D, E, F, G, H)  SIGNATURE_64 (A, B, C, D, E, F, G, H)
-    
 
-///
-///  Returns the byte offset to a field within a structure
-///
-#define EFI_FIELD_OFFSET(TYPE,Field) ((UINTN)(&(((TYPE *) 0)->Field)))
 
 //
 // The EFI memory allocation functions work in units of EFI_PAGEs that are
@@ -188,11 +177,6 @@ typedef union {
 
 #define EFI_PAGES_TO_SIZE(a)   ( (a) << EFI_PAGE_SHIFT)
 
-
-#define EFI_MAX_BIT               MAX_BIT
-#define EFI_MAX_ADDRESS           MAX_ADDRESS
-
-
 ///
 /// Limited buffer size for a language code recommended by RFC3066
 /// (42 characters plus a NULL terminator)