diff --git a/tools/tunslip6.c b/tools/tunslip6.c
index 64a171729..0a5337ffc 100644
--- a/tools/tunslip6.c
+++ b/tools/tunslip6.c
@@ -704,7 +704,7 @@ main(int argc, char **argv)
   prog = argv[0];
   setvbuf(stdout, NULL, _IOLBF, 0); /* Line buffered output. */
 
-  while((c = getopt(argc, argv, "B:H:D:Lhs:t:v::d::a:p:T")) != -1) {
+  while((c = getopt(argc, argv, "B:HLhs:t:v::d::a:p:T")) != -1) {
     switch(c) {
     case 'B':
       baudrate = atoi(optarg);