diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index f947ac6bb67cee75697420b5de2e72895646deef..a29f06c0bcf06e368fdd8173dd6746483f57c03a 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -509,7 +509,7 @@ static int ieee80211_set_probe_resp(struct ieee80211_sub_if_data *sdata,
 	if (!resp || !resp_len)
 		return -EINVAL;
 
-	old = sdata->u.ap.probe_resp;
+	old = rtnl_dereference(sdata->u.ap.probe_resp);
 
 	new = dev_alloc_skb(resp_len);
 	if (!new)