diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c
index f9f387fff55c..ac8967bc7c59 100644
--- a/drivers/net/wireless/iwlwifi/iwl4965-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c
@@ -7448,7 +7448,7 @@ static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
 
 	if (priv->vif) {
 		IWL_DEBUG_MAC80211("leave - vif != NULL\n");
-		return 0;
+		return -EOPNOTSUPP;
 	}
 
 	spin_lock_irqsave(&priv->lock, flags);