diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index bebd89f7f6c3b5c8a3d561c4870b54424b087ce3..da36581779974c28650a5df68fd26a76eae99a6f 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -3802,6 +3802,14 @@ int ieee80211_add_srates_ie(struct ieee80211_vif *vif,
 int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif,
 				struct sk_buff *skb, bool need_basic);
 
+/**
+ * ieee80211_ave_rssi - report the average rssi for the specified interface
+ *
+ * @vif: the specified virtual interface
+ *
+ * This function return the average rssi value for the requested interface.
+ * It assumes that the given vif is valid.
+ */
 int ieee80211_ave_rssi(struct ieee80211_vif *vif);
 
 #endif /* MAC80211_H */
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 577942bfc0243211e0a88e79bc7bf7ab404076b0..8ba8b49c95318d5cbc4b378861592cb178d1fb64 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1803,3 +1803,4 @@ int ieee80211_ave_rssi(struct ieee80211_vif *vif)
 
 	return ifmgd->ave_beacon_signal;
 }
+EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);