diff --git a/scripts/gnt-instance b/scripts/gnt-instance
index 7d3aa9418c79fb34b46d273fa87510dd206286bc..6bfd3e5a5101d1d9710df94fe6fae5264a598bb8 100755
--- a/scripts/gnt-instance
+++ b/scripts/gnt-instance
@@ -871,7 +871,7 @@ commands = {
                                        " to replace (e.g. sda) (optional,"
                                        " defaults to all disks")),
                      ],
-                    "[-n NODE] <instance>",
+                    "[-s|-p|-n NODE] <instance>",
                     "Replaces all disks for the instance"),
   'modify': (SetInstanceParms, ARGS_ONE,
              [DEBUG_OPT, FORCE_OPT,