diff --git a/mac80211.c b/mac80211.c
index 6edbe67..ef3ae34 100644
--- a/mac80211.c
+++ b/mac80211.c
@@ -811,7 +811,7 @@ mt76_check_ccmp_pn(struct sk_buff *skb)
 		 */
 		hdr = mt76_skb_get_hdr(skb);
 		if (ieee80211_is_frag(hdr) &&
-		    !ieee80211_is_first_frag(hdr->frame_control))
+		    !ieee80211_is_first_frag(hdr->seq_ctrl))
 			return 0;
 	}