diff -urN tcpdump-3.8.3.old/tcpdump.c tcpdump-3.8.3.dev/tcpdump.c
--- tcpdump-3.8.3.old/tcpdump.c	2004-03-17 20:47:48.000000000 +0100
+++ tcpdump-3.8.3.dev/tcpdump.c	2005-04-29 00:53:20.000000000 +0200
@@ -596,20 +596,6 @@
 				error("invalid data link type %s", dlt_name);
 			break;
 
-#if defined(HAVE_PCAP_DEBUG) || defined(HAVE_YYDEBUG)
-		case 'Y':
-			{
-			/* Undocumented flag */
-#ifdef HAVE_PCAP_DEBUG
-			extern int pcap_debug;
-			pcap_debug = 1;
-#else
-			extern int yydebug;
-			yydebug = 1;
-#endif
-			}
-			break;
-#endif
 		default:
 			usage();
 			/* NOTREACHED */