--- nmap.orig.cc	2006-06-25 00:36:25.000000000 -0400
+++ nmap.cc	2006-06-25 00:37:03.000000000 -0400
@@ -233,6 +233,7 @@
        "  --version-trace: Show detailed version scan activity (for debugging)\n"
        "OS DETECTION:\n"
        "  -O: Enable OS detection\n"
+       "  -O1: Enable Version 1 of OS detection\n"
        "  --osscan-limit: Limit OS detection to promising targets\n"
        "  --osscan-guess: Guess OS more aggressively\n"
        "TIMING AND PERFORMANCE:\n"