*** ripngd/ripng_main.c
--- ripngd/ripng_main.c
@@ -205,7 +205,7 @@
     {
       int opt;
 
-      opt = getopt_long (argc, argv, "df:i:hA:P:u:g:vC", longopts, 0);
+      opt = getopt_long (argc, argv, "df:i:hA:P:ru:g:vC", longopts, 0);
     
       if (opt == EOF)
 	break;