diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 258fbdb..96c5943 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -532,7 +532,7 @@
 
 	if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT))
 		tx->key = NULL;
-	else if (tx->sta && (key = rcu_dereference(tx->sta->key)))
+	else if (tx->sta && (key = rcu_dereference(tx->sta->ptk)))
 		tx->key = key;
 	else if (ieee80211_is_mgmt(hdr->frame_control) &&
 		 is_multicast_ether_addr(hdr->addr1) &&