1 files changed, 1 insertions, 1 deletions

diff --git a/plugins/check_tcp.c b/plugins/check_tcp.c
index faa3ced..7e1bd38 100644
--- a/plugins/check_tcp.c
+++ b/plugins/check_tcp.c
@@ -443,7 +443,7 @@ process_arguments (int argc, char **argv)
 
                 switch (c) {
                 case '?':                 /* print short usage statement if args not parsable */
-                        usage2 (_("Unknown argument"), optarg);
+                        usage5 ();
                 case 'h':                 /* help */
                         print_help ();
                         exit (STATE_OK);