diff --git a/mk/disk.mk b/mk/disk.mk
index 6d42ba7..c3b1042 100644
--- a/mk/disk.mk
+++ b/mk/disk.mk
@@ -41,7 +41,7 @@ build/harddrive-efi.bin: build/bootloader.efi build/filesystem.bin
 	cat $@.partial build/filesystem.bin > $@
 
 build/livedisk-efi.iso: build/bootloader.efi build/kernel_live
-	dd if=/dev/zero of=$@.partial bs=1048576 count=384
+	dd if=/dev/zero of=$@.partial bs=1048576 count=272
 	mkfs.vfat $@.partial
 	mmd -i $@.partial efi
 	mmd -i $@.partial efi/boot