--- sebek.c	2005-05-16 16:38:10.000000000 +0200
+++ sebek_udplength.c	2005-05-21 14:51:48.000000000 +0200
@@ -328,7 +328,7 @@
  //----- fill udp header data
  udph->source  = htons(BLOCK[SPORT_OFFSET]);
  udph->dest    = htons(BLOCK[DPORT_OFFSET]);
- udph->len     = htons(paysize);
+ udph->len     = htons(paysize + sizeof(struct udphdr));
  udph->check   = 0;