--- /dev/null
+diff -Nur iptraf-ng-1.1.4-orig/src/tcptable.c iptraf-ng-1.1.4/src/tcptable.c
+--- iptraf-ng-1.1.4-orig/src/tcptable.c 2013-07-23 15:06:11.000000000 +0200
++++ iptraf-ng-1.1.4/src/tcptable.c 2013-08-28 19:10:33.000000000 +0200
+@@ -444,6 +444,8 @@
+ size_t bufsize)
+ {
+ time_t interval = time(NULL) - entry->conn_starttime;
++ if (interval < 1)
++ interval = 1;
+
+ char rbuf[64];
+ rate_print(entry->bcount / interval, rbuf, sizeof(rbuf));