1 files changed, 1 insertions, 1 deletions

diff --git a/plugins/check_pgsql.c b/plugins/check_pgsql.c
index 41c51413..cbff8d75 100644
--- a/plugins/check_pgsql.c
+++ b/plugins/check_pgsql.c
@@ -225,7 +225,7 @@ process_arguments (int argc, char **argv)
 
                 switch (c) {
                 case '?':     /* usage */
-                        usage2 (_("Unknown argument"), optarg);
+                        usage5 ();
                 case 'h':     /* help */
                         print_help ();
                         exit (STATE_OK);