diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c
index 246f906..9912ad5 100644
--- a/net/sched/cls_u32.c
+++ b/net/sched/cls_u32.c
@@ -433,7 +433,9 @@ static int u32_delete(struct tcf_proto *tp, unsigned long arg)
 
 	if (ht->refcnt == 1) {
 		ht->refcnt--;
+		tcf_tree_lock(tp);
 		u32_destroy_hnode(tp, ht);
+		tcf_tree_unlock(tp);
 	} else {
 		return -EBUSY;
 	}