diff --git a/drivers/net/wireless/iwlwifi/iwl-mac80211.c b/drivers/net/wireless/iwlwifi/iwl-mac80211.c
index d2be4b6..1bd021a 100644
--- a/drivers/net/wireless/iwlwifi/iwl-mac80211.c
+++ b/drivers/net/wireless/iwlwifi/iwl-mac80211.c
@@ -654,6 +654,8 @@
 		ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 		break;
 	case IEEE80211_AMPDU_TX_START:
+		if (!trans(priv)->ops->tx_agg_setup)
+			break;
 		if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 			break;
 		IWL_DEBUG_HT(priv, "start Tx\n");