diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index b10b297e76b7..86bc714a93a8 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -1516,6 +1516,11 @@ nl802154_dump_llsec_key(struct sk_buff *skb, struct netlink_callback *cb)
 	if (err)
 		return err;
 
+	if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR) {
+		err = skb->len;
+		goto out_err;
+	}
+
 	if (!wpan_dev->netdev) {
 		err = -EINVAL;
 		goto out_err;