diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index eebb70b..80e0618 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1954,6 +1954,16 @@
 	return ieee80211_ibss_leave(IEEE80211_DEV_TO_SUB_IF(dev));
 }
 
+static int ieee80211_set_mcast_rate(struct wiphy *wiphy, struct net_device *dev,
+				    int rate[IEEE80211_NUM_BANDS])
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	memcpy(sdata->vif.bss_conf.mcast_rate, rate, sizeof(rate));
+
+	return 0;
+}
+
 static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
 {
 	struct ieee80211_local *local = wiphy_priv(wiphy);
@@ -3180,6 +3190,7 @@
 	.disassoc = ieee80211_disassoc,
 	.join_ibss = ieee80211_join_ibss,
 	.leave_ibss = ieee80211_leave_ibss,
+	.set_mcast_rate = ieee80211_set_mcast_rate,
 	.set_wiphy_params = ieee80211_set_wiphy_params,
 	.set_tx_power = ieee80211_set_tx_power,
 	.get_tx_power = ieee80211_get_tx_power,