diff -ruN ipw2100-1.1.2-old/ipw2100.h ipw2100-1.1.2/ipw2100.h
--- ipw2100-1.1.2-old/ipw2100.h	2005-09-08 10:36:09.000000000 +0200
+++ ipw2100-1.1.2/ipw2100.h	2005-09-08 10:35:55.000000000 +0200
@@ -786,7 +786,7 @@
 
 
 
-#define IPW_HEADER_802_11_SIZE		 sizeof(struct ieee80211_header_data)
+#define IPW_HEADER_802_11_SIZE		 sizeof(struct ieee80211_hdr_3addr)
 #define IPW_MAX_80211_PAYLOAD_SIZE              2304U
 #define IPW_MAX_802_11_PAYLOAD_LENGTH		2312
 #define IPW_MAX_ACCEPTABLE_TX_FRAME_LENGTH	1536