1 files changed, 1 insertions, 1 deletions

diff --git a/plugins-root/check_dhcp.c b/plugins-root/check_dhcp.c
index fbfb3311..245946b5 100644
--- a/plugins-root/check_dhcp.c
+++ b/plugins-root/check_dhcp.c
@@ -1091,7 +1091,7 @@ int call_getopt(int argc, char **argv){
                         break;
 
                 case '?': /* help */
-                        usage2 (_("Unknown argument"), optarg);
+                        usage5 ();
                         break;
 
                 default: