diff --git a/package/madwifi/patches/436-injection_checks.patch b/package/madwifi/patches/436-injection_checks.patch
new file mode 100644
index 0000000000..7bdd82c0f9
--- /dev/null
+++ b/package/madwifi/patches/436-injection_checks.patch
@@ -0,0 +1,26 @@
+--- a/ath/if_ath.c
++++ b/ath/if_ath.c
+@@ -3199,7 +3199,13 @@ ath_tx_startraw(struct net_device *dev, 
+ 	struct ieee80211_frame *wh;
+ 
+ 	wh = (struct ieee80211_frame *)skb->data;
++
+ 	try0 = ph->try0;
++	if (!try0)
++		try0 = 1;
++	else if (try0 > 11)
++		try0 = 11;
++
+ 	rt = sc->sc_currates;
+ 	txrate = dot11_to_ratecode(sc, rt, ph->rate0);
+ 	power = ph->power > 63 ? 63 : ph->power;
+@@ -3224,7 +3230,8 @@ ath_tx_startraw(struct net_device *dev, 
+ 	rt = sc->sc_currates;
+ 	KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode));
+ 
+-	if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
++	if (((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_DATA) ||
++		IEEE80211_IS_MULTICAST(wh->i_addr1)) {
+ 		flags |= HAL_TXDESC_NOACK;	/* no ack on broad/multicast */
+ 		sc->sc_stats.ast_tx_noack++;
+ 		try0 = 1;