diff --git a/contrib/ipfilter/tools/ippool.c b/contrib/ipfilter/tools/ippool.c
index d043d0179e0..aff39217a75 100644
--- a/contrib/ipfilter/tools/ippool.c
+++ b/contrib/ipfilter/tools/ippool.c
@@ -451,8 +451,14 @@ poolstats(argc, argv)
 		case 'v' :
 			opts |= OPT_VERBOSE;
 			break;
+		default :
+			usage(argv[0]);
+			break;		/* keep compiler happy */
 		}
 
+	if (argc - 1 - optind > 0)
+		usage(argv[0]);
+
 	if (opts & OPT_DEBUG)
 		fprintf(stderr, "poolstats: opts = %#x\n", opts);