diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c
index ded6c44778..f90207c508 100644
--- a/src/nspawn/nspawn.c
+++ b/src/nspawn/nspawn.c
@@ -359,12 +359,16 @@ static int help(void) {
                "     --keep-unit            Do not register a scope for the machine, reuse\n"
                "                            the service unit nspawn is running in\n\n"
                "%3$sUser Namespacing:%4$s\n"
-               "  -U --private-users=pick   Run within user namespace, autoselect UID/GID range\n"
-               "     --private-users[=UIDBASE[:NUIDS]]\n"
+               "     --private-users=no     Run without user namespacing\n"
+               "     --private-users=yes|pick|identity\n"
+               "                            Run within user namespace, autoselect UID/GID range\n"
+               "     --private-users=UIDBASE[:NUIDS]\n"
                "                            Similar, but with user configured UID/GID range\n"
                "     --private-users-ownership=MODE\n"
                "                            Adjust ('chown') or map ('map') OS tree ownership\n"
-               "                            to private UID/GID range\n\n"
+               "                            to private UID/GID range\n"
+               "  -U                        Equivalent to --private-users=pick and\n"
+               "                            --private-users-ownership=auto\n\n"
                "%3$sNetworking:%4$s\n"
                "     --private-network      Disable network in container\n"
                "     --network-interface=INTERFACE\n"