diff --git a/[refs] b/[refs]
index ac64032db9e1..dfa7a5c11155 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 709dd3aaf5304993083c2297c73f5531c36fba5a
+refs/heads/master: 9e377202d2c968dde8efd6121d94c7f0a77787aa
diff --git a/trunk/net/dccp/input.c b/trunk/net/dccp/input.c
index 5e312b04a7db..cb0f5c9af1ba 100644
--- a/trunk/net/dccp/input.c
+++ b/trunk/net/dccp/input.c
@@ -300,6 +300,12 @@ static int dccp_rcv_request_sent_state_process(struct sock *sk,
 			goto out_invalid_packet;
 		}
 
+                if (dp->dccps_options.dccpo_send_ack_vector &&
+                    dccp_ackvec_add(dp->dccps_hc_rx_ackvec, sk,
+                                    DCCP_SKB_CB(skb)->dccpd_seq,
+                                    DCCP_ACKVEC_STATE_RECEIVED))
+                        goto out_invalid_packet; /* FIXME: change error code */
+
 		dp->dccps_isr = DCCP_SKB_CB(skb)->dccpd_seq;
 		dccp_update_gsr(sk, dp->dccps_isr);
 		/*