diff --git a/docs/chapters/subcommands/list.rst b/docs/chapters/subcommands/list.rst
index 1875ed73..fa1c4074 100644
--- a/docs/chapters/subcommands/list.rst
+++ b/docs/chapters/subcommands/list.rst
@@ -19,6 +19,6 @@ Use ``-p|--pretty`` to print in columns instead of rows.
     
       -d | --down                List stopped jails only.
       -j | --json                List jails or sub-arg(s) in json format.
-      -p | --pretty              Print JSON in columns.
+      -p | --pretty              Print JSON in columns. Must be used with -j|--json.
       -u | --up                  List running jails only.
       -x | --debug               Enable debug mode.