diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 4dd3d93..e19815e 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -19,6 +19,7 @@
 #include <linux/wireless.h>
 #include <linux/device.h>
 #include <linux/ieee80211.h>
+#include <net/sched_generic.h>
 #include <net/wireless.h>
 #include <net/cfg80211.h>
 
@@ -343,7 +344,10 @@ struct ieee80211_tx_info {
 
 static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb)
 {
-	return (struct ieee80211_tx_info *)skb->cb;
+	BUILD_BUG_ON(sizeof(skb->cb) <
+		     sizeof(struct qdisc_skb_cb) +
+		     sizeof(struct ieee80211_tx_info));
+	return (struct ieee80211_tx_info *)qdisc_skb_cb(skb)->data;
 }