diff --git a/freeldr/bootsect/isoboot.asm b/freeldr/bootsect/isoboot.asm
index 7dae2c1d647..ee466703ee7 100644
--- a/freeldr/bootsect/isoboot.asm
+++ b/freeldr/bootsect/isoboot.asm
@@ -996,7 +996,8 @@ dapa:		dw 16				; Packet size
 		alignb 4, db 0
 MaxTransfer	dw 2 ;32				; Max sectors per transfer
 
-		times 2048-($-$$) nop		; Pad to file offset 2048
+		times 2046-($-$$) db 0		; Pad to file offset 2046
+		dw 0aa55h			; BootSector signature