diff --git a/net/dccp/input.c b/net/dccp/input.c
index 9a724ff..55e921b 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -311,7 +311,7 @@
 			goto out_invalid_packet;
 		}
 
-		dccp_sync_mss(sk, dp->dccps_pmtu_cookie);
+		dccp_sync_mss(sk, icsk->icsk_pmtu_cookie);
 
 		/*
 		 *    Step 10: Process REQUEST state (second part)