diff -u bwbar-1.2.3/bwbar.c bwbar-1.2.3.new/bwbar.c
--- bwbar-1.2.3/bwbar.c	2006-08-26 18:31:26.000000000 +0200
+++ bwbar-1.2.3.new/bwbar.c	2008-09-01 11:30:41.000000000 +0200
@@ -214,7 +216,7 @@
 
   program = argv[0];
 
-  while ( (opt = getopt_long(argc, argv, "iof:p:t:x:y:b:kMGh", longopts, NULL)) != -1 ) {
+  while ( (opt = getopt_long(argc, argv, "iof:p:t:x:y:b:kMGhD", longopts, NULL)) != -1 ) {
     switch ( opt ) {
     case 'i':
       measure_input = 1;
@@ -260,6 +260,8 @@
       unit = 1.0e+9;
       unit_name = "Gbit/s";
       break;
+    case 'D':
+      break;
     case 'h':
       usage(0);
       break;