diff --git a/clock.c b/clock.c
index 82692bc..b0e65a5 100644
--- a/clock.c
+++ b/clock.c
@@ -70,6 +70,7 @@ struct clock {
 	tmv_t path_delay;
 	struct mave *avg_delay;
 	struct freq_estimator fest;
+	double nrr;
 	tmv_t c1;
 	tmv_t c2;
 	tmv_t t1;
@@ -685,9 +686,10 @@ void clock_path_delay(struct clock *c, struct timespec req, struct timestamp rx,
 	pr_debug("path delay    %10lld %10lld", c->path_delay, pd);
 }
 
-void clock_peer_delay(struct clock *c, tmv_t ppd)
+void clock_peer_delay(struct clock *c, tmv_t ppd, double nrr)
 {
 	c->path_delay = ppd;
+	c->nrr = nrr;
 }
 
 void clock_remove_fda(struct clock *c, struct port *p, struct fdarray fda)
diff --git a/clock.h b/clock.h
index 56eac92..c801da7 100644
--- a/clock.h
+++ b/clock.h
@@ -142,8 +142,9 @@ void clock_path_delay(struct clock *c, struct timespec req, struct timestamp rx,
  * Provide the estimated peer delay from a slave port.
  * @param c           The clock instance.
  * @param ppd         The peer delay as measured on a slave port.
+ * @param nrr         The neighbor rate ratio as measured on a slave port.
  */
-void clock_peer_delay(struct clock *c, tmv_t ppd);
+void clock_peer_delay(struct clock *c, tmv_t ppd, double nrr);
 
 /**
  * Poll for events and dispatch them.
diff --git a/port.c b/port.c
index 0ff5a73..4c3cc52 100644
--- a/port.c
+++ b/port.c
@@ -1183,7 +1183,7 @@ calc:
 		port_nrate_calculate(p, t3, t4, tmv_add(c1, c2));
 
 	if (p->state == PS_UNCALIBRATED || p->state == PS_SLAVE) {
-		clock_peer_delay(p->clock, p->peer_delay);
+		clock_peer_delay(p->clock, p->peer_delay, p->nrate.ratio);
 	}
 }