diff --git a/openstackclient/compute/v2/server.py b/openstackclient/compute/v2/server.py
index c80b5a3c25..c414f7e18e 100644
--- a/openstackclient/compute/v2/server.py
+++ b/openstackclient/compute/v2/server.py
@@ -977,7 +977,9 @@ class ListServer(command.Lister):
         parser.add_argument(
             '--ip6',
             metavar='<ip-address-regex>',
-            help=_('Regular expression to match IPv6 addresses'),
+            help=_('Regular expression to match IPv6 addresses. Note '
+                   'that this option only applies for non-admin users '
+                   'when using ``--os-compute-api-version`` 2.5 or greater.'),
         )
         parser.add_argument(
             '--name',