diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index bd4645b3a36c5abd9d8659039339c37a93b4c694..f62eeb37493120312bc7760d414aee86b8d6f75d 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -209,7 +209,6 @@ extern void dccp_v4_send_check(struct sock *sk, int len, struct sk_buff *skb);
 extern int  dccp_retransmit_skb(struct sock *sk, struct sk_buff *skb);
 
 extern void dccp_send_ack(struct sock *sk);
-extern void dccp_send_delayed_ack(struct sock *sk);
 extern void dccp_reqsk_send_ack(struct sk_buff *sk, struct request_sock *rsk);
 
 extern void dccp_send_sync(struct sock *sk, const u64 seq,
diff --git a/net/dccp/output.c b/net/dccp/output.c
index 6e23d5b57e7966183bddec6acb975d46951c0a50..d0c9ec6494bfd078716d253e02999cbcebcadd3f 100644
--- a/net/dccp/output.c
+++ b/net/dccp/output.c
@@ -477,6 +477,7 @@ void dccp_send_ack(struct sock *sk)
 
 EXPORT_SYMBOL_GPL(dccp_send_ack);
 
+/* FIXME: Is this still necessary (11.3) - currently nowhere used by DCCP. */
 void dccp_send_delayed_ack(struct sock *sk)
 {
 	struct inet_connection_sock *icsk = inet_csk(sk);