diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index f476aa6a771d..71385bfc15d6 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2785,6 +2785,7 @@ ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
 				cpu_to_le16(IEEE80211_FCTL_MOREDATA);
 		}
 
+		sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
 		if (!ieee80211_tx_prepare(sdata, &tx, skb))
 			break;
 		dev_kfree_skb_any(skb);