--- a/net80211/ieee80211.h
+++ b/net80211/ieee80211.h
@@ -174,8 +174,6 @@
 #define	IEEE80211_SEQ_SEQ_MASK			0xfff0
 #define	IEEE80211_SEQ_SEQ_SHIFT			4
 
-#define	IEEE80211_SEQ_LEQ(a,b)	((int)((a)-(b)) <= 0)
-
 #define	IEEE80211_NWID_LEN			32
 
 #define	IEEE80211_QOS_TXOP			0x00ff
--- a/net80211/ieee80211_input.c
+++ b/net80211/ieee80211_input.c
@@ -417,7 +417,7 @@
 				tid = 0;
 			rxseq = le16toh(*(__le16 *)wh->i_seq);
 			if ((wh->i_fc[1] & IEEE80211_FC1_RETRY) &&
-			    IEEE80211_SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) {
+			    (rxseq == ni->ni_rxseqs[tid])) {
 				/* duplicate, discard */
 				IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 					bssid, "duplicate",
