diff --git a/sbin/ipfw/ipfw.8 b/sbin/ipfw/ipfw.8
index 542724b7a068..39dc69e36c50 100644
--- a/sbin/ipfw/ipfw.8
+++ b/sbin/ipfw/ipfw.8
@@ -13,7 +13,7 @@
 .Cm add
 .Ar rule
 .Nm
-.Op Fl acdeftnNS
+.Op Fl acdefnNStT
 .Brq Cm list | show
 .Op Ar rule | first-last ...
 .Nm
@@ -54,7 +54,7 @@
 .Op Ar number ...
 .Pp
 .Nm
-.Op Fl cNnqS
+.Op Fl cnNqS
 .Oo
 .Fl p Ar preproc
 .Oo
@@ -261,7 +261,10 @@ listed.
 While listing pipes, sort according to one of the four
 counters (total or current packets or bytes).
 .It Fl t
-While listing, show last match timestamp.
+While listing, show last match timestamp (converted with ctime()).
+.It Fl T
+While listing, show last match timestamp (as seconds from the epoch).
+This form can be more convenient for postprocessing by scripts.
 .El
 .Pp
 To ease configuration, rules can be put into a file which is
diff --git a/sbin/ipfw/ipfw2.c b/sbin/ipfw/ipfw2.c
index 71009db8e7f0..1c6f94e3321c 100644
--- a/sbin/ipfw/ipfw2.c
+++ b/sbin/ipfw/ipfw2.c
@@ -902,7 +902,9 @@ show_ipfw(struct ip_fw *rule, int pcwidth, int bcwidth)
 		printf("%*llu %*llu ", pcwidth, align_uint64(&rule->pcnt),
 		    bcwidth, align_uint64(&rule->bcnt));
 
-	if (do_time) {
+	if (do_time == 2)
+		printf("%10u ", rule->timestamp);
+	else if (do_time == 1) {
 		char timestr[30];
 		time_t t = (time_t)0;
 
@@ -3667,7 +3669,7 @@ ipfw_main(int oldac, char **oldav)
 	save_av = av;
 
 	optind = optreset = 0;
-	while ((ch = getopt(ac, av, "acdefhnNqs:Stv")) != -1)
+	while ((ch = getopt(ac, av, "acdefhnNqs:STtv")) != -1)
 		switch (ch) {
 		case 'a':
 			do_acct = 1;
@@ -3717,6 +3719,10 @@ ipfw_main(int oldac, char **oldav)
 			do_time = 1;
 			break;
 
+		case 'T':
+			do_time = 2;	/* numeric timestamp */
+			break;
+
 		case 'v': /* verbose */
 			verbose = 1;
 			break;