diff --git a/net/sched/cls_fw.c b/net/sched/cls_fw.c
index f59a2c4aa039b463e6c4c7d4fc867ce6da8a7dcb..c797d6ada7de06948ef1fab1e225a224ffdc057d 100644
--- a/net/sched/cls_fw.c
+++ b/net/sched/cls_fw.c
@@ -101,9 +101,10 @@ static int fw_classify(struct sk_buff *skb, struct tcf_proto *tp,
 	struct fw_head *head = (struct fw_head*)tp->root;
 	struct fw_filter *f;
 	int r;
-	u32 id = skb->mark & head->mask;
+	u32 id = skb->mark;
 
 	if (head != NULL) {
+		id &= head->mask;
 		for (f=head->ht[fw_hash(id)]; f; f=f->next) {
 			if (f->id == id) {
 				*res = f->res;