diff --git a/net/rxrpc/output.c b/net/rxrpc/output.c
index 42410e910aff..cf73dc006c3b 100644
--- a/net/rxrpc/output.c
+++ b/net/rxrpc/output.c
@@ -445,7 +445,7 @@ send_fragmentable:
 					(char *)&opt, sizeof(opt));
 		if (ret == 0) {
 			ret = kernel_sendmsg(conn->params.local->socket, &msg,
-					     iov, 1, iov[0].iov_len);
+					     iov, 2, len);
 
 			opt = IPV6_PMTUDISC_DO;
 			kernel_setsockopt(conn->params.local->socket,