--- c39ed07929487457ae31f6d371409bde4fa430b0
+++ a2bd2f98b63f7e5968d81739b4e88687106ff3fd
@@ -1700,6 +1700,12 @@ void ieee80211_rx(struct ieee80211_hw *h
  */
 void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb);
 
+/*
+ * The TX headroom reserved by mac80211 for its own tx_status functions.
+ * This is enough for the radiotap header.
+ */
+#define IEEE80211_TX_STATUS_HEADROOM	13
+
 /**
  * ieee80211_tx_status - transmit status callback
  *