diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c
index f58971a4a2e3..9a1a84548bc6 100644
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c
@@ -302,7 +302,6 @@ ieee80211_classify(struct sk_buff *skb, struct ieee80211_network *network)
 	}
 }
 
-#define SN_LESS(a, b)		(((a-b)&0x800)!=0)
 static void ieee80211_tx_query_agg_cap(struct ieee80211_device *ieee,
 				       struct sk_buff *skb, struct cb_desc *tcb_desc)
 {