diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 118648af979c..7699fb410670 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -4434,7 +4434,7 @@ static void ieee80211_mlo_multicast_tx(struct net_device *dev,
 	u32 ctrl_flags = IEEE80211_TX_CTRL_MCAST_MLO_FIRST_TX;
 
 	if (hweight16(links) == 1) {
-		ctrl_flags |= u32_encode_bits(find_first_bit(&links, 16) - 1,
+		ctrl_flags |= u32_encode_bits(__ffs(links),
 					      IEEE80211_TX_CTRL_MLO_LINK);
 
 		__ieee80211_subif_start_xmit(skb, sdata->dev, 0, ctrl_flags,