// And do not count dhcp option header, or else will destory the serverhostname.\r
//\r
Options[PXEBC_DHCP4_TAG_INDEX_BOOTFILE] = (EFI_DHCP4_PACKET_OPTION *) (&Offer->Dhcp4.Header.BootFileName[0] -\r
- EFI_FIELD_OFFSET (EFI_DHCP4_PACKET_OPTION, Data[0]));\r
+ OFFSET_OF (EFI_DHCP4_PACKET_OPTION, Data[0]));\r
\r
}\r
\r