diff --git a/apps/bos/bochsrc b/apps/bos/bochsrc
index e26de783..de225b4c 100644
--- a/apps/bos/bochsrc
+++ b/apps/bos/bochsrc
@@ -1,3 +1,3 @@
-ata0-master: type=disk, path="boot.bin", mode=flat, cylinders=20, heads=16, spt=63
+ata0-master: type=disk, path="boot.bin", mode=flat, cylinders=1, heads=1, spt=1
 boot: disk
 log: -