diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index 4f9304567dcc..4eeef342c3c6 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -301,6 +301,9 @@ static void htb_add_to_id_tree(struct rb_root *root,
 
 /**
  * htb_add_to_wait_tree - adds class to the event queue with delay
+ * @q: the priority event queue
+ * @cl: the class to add
+ * @delay: delay in microseconds
  *
  * The class is added to priority event queue to indicate that class will
  * change its mode in cl->pq_key microseconds. Make sure that class is not