diff --git a/cddl/lib/libdtrace/tcp.d b/cddl/lib/libdtrace/tcp.d
index bf687a264649..4b826f175572 100644
--- a/cddl/lib/libdtrace/tcp.d
+++ b/cddl/lib/libdtrace/tcp.d
@@ -198,7 +198,7 @@ translator tcpsinfo_t < struct tcpcb *p > {
 	tcps_cwnd_ssthresh =	p == NULL ? -1  : p->snd_ssthresh;
 	tcps_sack_fack =	p == NULL ? 0  : p->snd_fack;
 	tcps_sack_snxt =	p == NULL ? 0  : p->sack_newdata;
-	tcps_rto =		p == NULL ? -1  : p->t_rxtcur / 1000; /* XXX */
+	tcps_rto =		p == NULL ? -1 : (p->t_rxtcur * 1000) / `hz;
 	tcps_mss =		p == NULL ? -1  : p->t_maxseg;
 	tcps_retransmit =	p == NULL ? -1 : p->t_rxtshift > 0 ? 1 : 0;
 	tcps_srtt =             p == NULL ? -1  : p->t_srtt;   /* smoothed RTT in units of (TCP_RTT_SCALE*hz) */