diff --git a/repmgr-client.c b/repmgr-client.c
index d20d79c0..b5befea1 100644
--- a/repmgr-client.c
+++ b/repmgr-client.c
@@ -1779,6 +1779,7 @@ do_help(void)
 	printf(_("    %s [OPTIONS] bdr     {register|unregister}\n"), progname());
 	printf(_("    %s [OPTIONS] node    {status|check|rejoin|service}\n"), progname());
 	printf(_("    %s [OPTIONS] cluster {show|event|matrix|crosscheck}\n"), progname());
+	printf(_("    %s [OPTIONS] witness {register|unregister}\n"), progname());
 
 	puts("");