diff --git a/doc/source/configuration/reference/hosts.rst b/doc/source/configuration/reference/hosts.rst
index fcc6cb0b3..0451a3838 100644
--- a/doc/source/configuration/reference/hosts.rst
+++ b/doc/source/configuration/reference/hosts.rst
@@ -963,11 +963,12 @@ For example:
 
    compute_lvm_groups_extra:
      - vgname: other-vg
-       disks: /dev/sdb
+       disks:
+         - /dev/sdb
        create: true
        lvnames:
          - lvname: other-vol
-           size: 100%
+           size: 100%FREE
            create: true
            mount: false