1 files changed, 1 insertions, 1 deletions

diff --git a/plugins/check_users.c b/plugins/check_users.c
index 0c62e3b1..8e5f23d7 100644
--- a/plugins/check_users.c
+++ b/plugins/check_users.c
@@ -156,7 +156,7 @@ 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);