diff --git a/net/dccp/minisocks.c b/net/dccp/minisocks.c
index 838f524..9bfd0dc 100644
--- a/net/dccp/minisocks.c
+++ b/net/dccp/minisocks.c
@@ -236,7 +236,7 @@
 
 EXPORT_SYMBOL_GPL(dccp_child_process);
 
-void dccp_reqsk_send_ack(struct sock *sk, struct sk_buff *skb,
+void dccp_reqsk_send_ack(const struct sock *sk, struct sk_buff *skb,
 			 struct request_sock *rsk)
 {
 	DCCP_BUG("DCCP-ACK packets are never sent in LISTEN/RESPOND state");