$OpenBSD$
--- main.cpp.orig	Thu Aug 18 10:13:39 2011
+++ main.cpp	Thu Aug 18 10:15:55 2011
@@ -141,8 +141,8 @@ Options: vic [-HPs] [-A nv|ivs|rtp] [-B maxbps] [-b ne
     [-f bvc|cellb|h261|jpeg|nv|mpeg4|h264] [-F maxfps] [-i ifAddr ]\n\
     [-I channel] [-K key ] [-L flowLabel (ip6 only)] [-l (creates log file)]\n\
     [-M colormap] [-m mtu] [-N session] [-n atm|ip|ip6|rtip]\n\
-    [-o clipfile] [-Q (queries and lists input devices)] [-t ttl]\n\
-    [-U interval] [-u script] [-v version] [-V visual]\n\
+    [-o clipfile] [-p localport] [-Q (queries and lists input devices)]\n\
+    [-t ttl] [-U interval] [-u script] [-v version] [-V visual]\n\
     [-x ifIndex (ip6 only)] [-X resource=value] [-j numlayers]\n\
     dest/port[/fmt/ttl]\n";
 
@@ -525,7 +525,7 @@ int main(int argc, const char** argv)
 
 	// Option list; If letter is followed by ':' then it takes an argument
 	const char* options = 
-		"A:B:b:C:c:D:d:f:F:HI:i:j:K:lL:M:m:N:n:o:Pq:QrsST:t:U:u:vV:w:x:X:y";
+		"A:B:b:C:c:D:d:f:F:HI:i:j:K:lL:M:m:N:n:o:p:Pq:QrsST:t:U:u:vV:w:x:X:y";
 	/* process display and window (-use) options before initialising tcl/tk */
 	char buf[256], tmp[256];
 	const char *display=0, *use=0;
@@ -705,6 +705,10 @@ int main(int argc, const char** argv)
 
 		case 'o':
 			tcl.add_option("outfile", optarg);
+			break;
+
+		case 'p':
+			tcl.add_option("localport", optarg);
 			break;
 
 		case 'P':