diff --git a/src/bin/scripts/createuser.c b/src/bin/scripts/createuser.c
index f8ff133f53..0a2beeece5 100644
--- a/src/bin/scripts/createuser.c
+++ b/src/bin/scripts/createuser.c
@@ -426,7 +426,8 @@ help(const char *progname)
 	printf(_("  -R, --no-createrole       role cannot create roles (default)\n"));
 	printf(_("  -s, --superuser           role will be superuser\n"));
 	printf(_("  -S, --no-superuser        role will not be superuser (default)\n"));
-	printf(_("  -v, --valid-until         password expiration date for role\n"));
+	printf(_("  -v, --valid-until=TIMESTAMP\n"
+		         "                            password expiration date for role\n"));
 	printf(_("  -V, --version             output version information, then exit\n"));
 	printf(_("  --interactive             prompt for missing role name and attributes rather\n"
 			 "                            than using defaults\n"));