Something

--- net80211/ieee80211_input.c  2007-05-23 01:43:05.000000000 -0700
+++ net80211/ieee80211_input.c  2007-06-04 02:45:27.000000000 -0700
@@ -3536,10 +3536,14 @@
        case IEEE80211_FC0_SUBTYPE_DEAUTH: {
                u_int16_t reason;
 
-               if (vap->iv_state == IEEE80211_S_SCAN) {
-                       vap->iv_stats.is_rx_mgtdiscard++;
-                       return;
-               }
+
+                if (vap->iv_state == IEEE80211_M_STA &&
+                   vap->iv_state == IEEE80211_M_MONITOR &&
+                   vap->iv_state == IEEE80211_S_SCAN) {
+                        vap->iv_stats.is_rx_mgtdiscard++;
+                        return;
+                }
+
                /*
                 * deauth frame format
                 *      [2] reason
@@ -3572,6 +3576,8 @@
 
                if (vap->iv_state != IEEE80211_S_RUN &&
                    vap->iv_state != IEEE80211_S_ASSOC &&
+                   vap->iv_state == IEEE80211_M_STA &&
+                    vap->iv_state == IEEE80211_M_MONITOR &&
                    vap->iv_state != IEEE80211_S_AUTH) {
                        vap->iv_stats.is_rx_mgtdiscard++;
                        return;