diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 3469bbd..bb9f836 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1411,6 +1411,7 @@
 		}
 
 		sta->sdata = vlansdata;
+		ieee80211_check_fast_xmit(sta);
 
 		if (sta->sta_state == IEEE80211_STA_AUTHORIZED &&
 		    prev_4addr != new_4addr) {