diff --git a/sys/dev/iwm/if_iwm.c b/sys/dev/iwm/if_iwm.c
index 09d6311b8e51..c97d132fd3b7 100644
--- a/sys/dev/iwm/if_iwm.c
+++ b/sys/dev/iwm/if_iwm.c
@@ -4282,6 +4282,8 @@ iwm_setrates(struct iwm_softc *sc, struct iwm_node *in, int dot11rate)
 //	int txant = 0;
 	int rix;
 
+	device_printf(sc->sc_dev, "%s: dot11rate=%d\n", __func__, dot11rate);
+
 	/*
 	 * Look up the rate index for the given legacy rate.
 	 *
@@ -4340,6 +4342,15 @@ iwm_setrates(struct iwm_softc *sc, struct iwm_node *in, int dot11rate)
 		int rate = rs->rs_rates[rix - i] & IEEE80211_RATE_VAL;
 		int nextant;
 
+		device_printf(sc->sc_dev,
+		    "%s: nrates=%d, i=%d, rate=%d, rix=%d, idx=%d\n",
+		    __func__,
+		    nrates,
+		    i,
+		    rate,
+		    rix,
+		    rix - i);
+
 		/* Map 802.11 rate to HW rate index. */
 		ridx = iwm_rate2ridx(sc, rate);
 		if (ridx == -1)