// FUTURE: use STR(), #define Print printf
-#define copy_guid(destguid, srcguid) (memcpy(destguid, srcguid, 16))
+#define copy_guid(destguid, srcguid) (CopyMem(destguid, srcguid, 16))
#define guids_are_equal(guid1, guid2) (memcmp(guid1, guid2, 16) == 0)
#define EFI_UNSUPPORTED 1