1 files changed, 1 insertions, 1 deletions

diff --git a/plugins/check_radius.c b/plugins/check_radius.c
index b1bb928f..4b340c3b 100644
--- a/plugins/check_radius.c
+++ b/plugins/check_radius.c
@@ -235,7 +235,7 @@ 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 (OK);