diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index ac805f56627ab90b30fb74ce9dac74f8f824d8e9..7d933fd8e5bbec0589626966210c536d22ae3523 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -899,6 +899,11 @@ static void ath9k_stop(struct ieee80211_hw *hw)
 
 	spin_unlock_bh(&sc->sc_pcu_lock);
 
+	/* Clear key cache entries explicitly to get rid of any potentially
+	 * remaining keys.
+	 */
+	ath9k_cmn_init_crypto(sc->sc_ah);
+
 	ath9k_ps_restore(sc);
 
 	sc->ps_idle = prev_idle;