diff --git a/boot/fatvbr.asm b/boot/fatvbr.asm
index 70059cf..a75338e 100644
--- a/boot/fatvbr.asm
+++ b/boot/fatvbr.asm
@@ -1,6 +1,5 @@
 ; Memory layout:
-%define mbr       0x00600 ; 1 sector
-%define self      0x00800 ; 1 sector
+%define self      0x00600 ; 1 sector
 %define fattab    0x01000 ; variable size
 %define rootdir   0x06000 ; variable size
 %define psp       (prog - 0x100)