/// computes this size correctly no matter how big the FileName array is declared.\r
/// This is required to make the EFI_FILE_INFO data structure ANSI compilant.\r
///\r
-#define SIZE_OF_EFI_FILE_INFO EFI_FIELD_OFFSET (EFI_FILE_INFO, FileName)\r
+#define SIZE_OF_EFI_FILE_INFO OFFSET_OF (EFI_FILE_INFO, FileName)\r
\r
extern EFI_GUID gEfiFileInfoGuid;\r
\r