diff -ubBr tcpdstat-uw/net_read.c tcpdstat-uw-new/net_read.c
--- tcpdstat-uw/net_read.c	2002-05-22 02:39:20.000000000 +0200
+++ tcpdstat-uw-new/net_read.c	2007-10-07 21:31:02.000000000 +0200
@@ -146,7 +146,7 @@
 pcap_t *pd;
 int pcapfd;
 
-static int packet_length;		/* length of current packet */
+int packet_length;		/* length of current packet */
 
 #define STAT_ADD(name) \
     { tcpdstat[(name)].packets++; tcpdstat[(name)].bytes += packet_length; }