diff --git a/gen_disks.sh b/gen_disks.sh
index dafd9cf..5e85b57 100755
--- a/gen_disks.sh
+++ b/gen_disks.sh
@@ -13,7 +13,7 @@ origdir="$(pwd)"
 
 for dir in output/*/; do
 	pushd $dir
-	cp "$origdir/dummydisk.img" "./disk.img"
+	cp --preserve=mode,ownership "$origdir/dummydisk.img" "./disk.img"
 	loop="$(losetup --partscan --show --find ./disk.img)"
 	mount -t ext4 "${loop}p3" "$mount"
 	while read what where; do