diff --git a/tools/make-iso.sh b/tools/make-iso.sh
index 71c5dfe8..fd2865a5 100755
--- a/tools/make-iso.sh
+++ b/tools/make-iso.sh
@@ -7,6 +7,6 @@ cd $LUNA_ROOT
 
 fakeroot -u -s $LUNA_ROOT/.fakeroot -- tools/install.sh
 
-genext2fs -d base -B 4096 -b 512 -L luna-rootfs -U -N 512 build/ext2fs.bin
+genext2fs -d base -B 4096 -b 1024 -L luna-rootfs -U -N 1024 build/ext2fs.bin
 
-fakeroot -u -i $LUNA_ROOT/.fakeroot -- mkbootimg luna.json Luna.iso
+fakeroot -u -i $LUNA_ROOT/.fakeroot mkbootimg luna.json Luna.iso