diff --git a/debian/chroot.install b/debian/chroot.install
index 471d65d..d90f71f 100755
--- a/debian/chroot.install
+++ b/debian/chroot.install
@@ -48,7 +48,7 @@ fi
 
 ### Format the LV in ext4
 for lvname in /dev/mapper/"${vgname}"-*; do
-	mkfs.ext4 "${lvname}"
+	mkfs.ext4 -F "${lvname}"
 done
 
 ### And format the swap