diff --git a/boot/floppy.asm b/boot/floppy.asm
index 004d47f..0725eae 100644
--- a/boot/floppy.asm
+++ b/boot/floppy.asm
@@ -29,7 +29,7 @@ fdc:		; FDC Descriptor as per ECMA-107
 .po:
   dd 0		; partition offset (in LBA blocks)
 .lrgts:
-  dw 0
+  dd 0
 .drv:
   db 0		; drive number
   db 0