--- a/ath/if_ath.c
+++ b/ath/if_ath.c
@@ -1307,6 +1307,7 @@
 	vap->iv_key_set = ath_key_set;
 	vap->iv_key_update_begin = ath_key_update_begin;
 	vap->iv_key_update_end = ath_key_update_end;
+	vap->iv_maxrateindex = 0;
 	if (sc->sc_default_ieee80211_debug) {
 		/* User specified defaults for new VAPs were provided, so
 		 * use those (only). */
--- a/ath_rate/minstrel/minstrel.c
+++ b/ath_rate/minstrel/minstrel.c
@@ -622,8 +622,12 @@
 			return;
 		}
 		sn->static_rate_ndx = -1;
+		if (vap->iv_maxrateindex == 0 || ni->ni_rates.rs_nrates <= 0
+		    || vap->iv_maxrateindex > ni->ni_rates.rs_nrates)
+			sn->num_rates = ni->ni_rates.rs_nrates;
+		else
+			sn->num_rates = vap->iv_maxrateindex;
 
-		sn->num_rates = ni->ni_rates.rs_nrates;
 		for (x = 0; x < ni->ni_rates.rs_nrates; x++) {
 			sn->rs_rateattempts 	[x] = 0;
 			sn->rs_thisprob 	[x] = 0;
--- a/ath_rate/sample/sample.c
+++ b/ath_rate/sample/sample.c
@@ -835,7 +835,12 @@
 	}
 	sn->static_rate_ndx = -1;
 
-	sn->num_rates = ni->ni_rates.rs_nrates;
+	if (vap->iv_maxrateindex == 0 || ni->ni_rates.rs_nrates <= 0
+	    || vap->iv_maxrateindex > ni->ni_rates.rs_nrates)
+		sn->num_rates = ni->ni_rates.rs_nrates;
+	else
+		sn->num_rates = vap->iv_maxrateindex;
+
 	for (x = 0; x < ni->ni_rates.rs_nrates; x++) {
 		sn->rates[x].rate = ni->ni_rates.rs_rates[x] & IEEE80211_RATE_VAL;
 		sn->rates[x].rix = sc->sc_rixmap[sn->rates[x].rate];
--- a/net80211/ieee80211_ioctl.h
+++ b/net80211/ieee80211_ioctl.h
@@ -641,6 +641,7 @@
 							   FCC requires 30m, so that is the default. */
 	IEEE80211_PARAM_BEACON_MISS_THRESH	= 73,	/* Beacon miss threshold (in beacons) */
 	IEEE80211_PARAM_BEACON_MISS_THRESH_MS	= 74,	/* Beacon miss threshold (in ms) */
+	IEEE80211_PARAM_MAXRATE			= 75,	/* Maximum rate (by table index) */
 };
 
 #define	SIOCG80211STATS			(SIOCDEVPRIVATE+2)
--- a/net80211/ieee80211_var.h
+++ b/net80211/ieee80211_var.h
@@ -281,6 +281,7 @@
 	struct ieee80211_spy iv_spy;         		/* IWSPY support */
 	struct ieee80211_app_ie app_ie[IEEE80211_APPIE_NUM_OF_FRAME]; /* app-specified IEs by frame type */
 	u_int32_t app_filter;				/* filters which management frames are forwarded to app */
+	int iv_maxrateindex;
 };
 
 /* Debug functions need the defintion of struct ieee80211vap because iv_debug 
--- a/net80211/ieee80211_wireless.c
+++ b/net80211/ieee80211_wireless.c
@@ -2839,6 +2839,12 @@
 		else
 			ic->ic_flags_ext &= ~IEEE80211_FEXT_MARKDFS;
 		break;
+	case IEEE80211_PARAM_MAXRATE:
+		if (value > 0)
+			vap->iv_maxrateindex = value;
+		else
+			vap->iv_maxrateindex = 0;
+		break;
 #ifdef ATH_REVERSE_ENGINEERING
 	case IEEE80211_PARAM_DUMPREGS:
 		ieee80211_dump_registers(dev, info, w, extra);
@@ -3174,6 +3180,9 @@
 		else
 			param[0] = 0;
 		break;
+	case IEEE80211_PARAM_MAXRATE:
+		param[0] = vap->iv_maxrateindex;
+		break;
 	default:
 		return -EOPNOTSUPP;
 	}
@@ -5610,6 +5619,10 @@
 	  0, IW_PRIV_TYPE_APPIEBUF, "getiebuf" },
 	{ IEEE80211_IOCTL_FILTERFRAME,
 	  IW_PRIV_TYPE_FILTER , 0, "setfilter" },
+	{IEEE80211_PARAM_MAXRATE,
+	 IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "maxrate"},
+	{IEEE80211_PARAM_MAXRATE,
+	 0, IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, "get_maxrate"},
 
 #ifdef ATH_REVERSE_ENGINEERING
 	/*
