--- src/sys/dev/netif/ural/if_ural.c	2007/07/27 18:07:21	1.19
+++ src/sys/dev/netif/ural/if_ural.c	2007/10/28 02:29:07	1.20
@@ -870,7 +870,7 @@ ural_newstate(struct ieee80211com *ic, e
 /* quickly determine if a given rate is CCK or OFDM */
 #define RAL_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22)
 
-#define RAL_ACK_SIZE	(sizeof(struct ieee80211_frame_ack) + IEEE80211_FCS_LEN)
+#define RAL_ACK_SIZE	(sizeof(struct ieee80211_frame_ack) + IEEE80211_CRC_LEN)
 
 #define RAL_RXTX_TURNAROUND	5	/* us */