diff --git a/sys/dev/cxgbe/tom/t4_listen.c b/sys/dev/cxgbe/tom/t4_listen.c
index 4eadce96d8d8..3b1bcf9da1e8 100644
--- a/sys/dev/cxgbe/tom/t4_listen.c
+++ b/sys/dev/cxgbe/tom/t4_listen.c
@@ -1185,6 +1185,7 @@ do_pass_accept_req(struct sge_iq *iq, const struct rss_header *rss,
 	struct synq_entry *synqe = NULL;
 	int reject_reason, v, ntids;
 	uint16_t vid;
+	u_int wnd;
 #ifdef INVARIANTS
 	unsigned int opcode = G_CPL_OPCODE(be32toh(OPCODE_TID(cpl)));
 #endif
@@ -1326,10 +1327,10 @@ found:
 
 	mtu_idx = find_best_mtu_idx(sc, &inc, be16toh(cpl->tcpopt.mss));
 	rscale = cpl->tcpopt.wsf && V_tcp_do_rfc1323 ? select_rcv_wscale() : 0;
-	SOCKBUF_LOCK(&so->so_rcv);
 	/* opt0 rcv_bufsiz initially, assumes its normal meaning later */
-	rx_credits = min(select_rcv_wnd(so) >> 10, M_RCV_BUFSIZ);
-	SOCKBUF_UNLOCK(&so->so_rcv);
+	wnd = max(so->sol_sbrcv_hiwat, MIN_RCV_WND);
+	wnd = min(wnd, MAX_RCV_WND);
+	rx_credits = min(wnd >> 10, M_RCV_BUFSIZ);
 
 	save_qids_in_mbuf(m, vi);
 	get_qids_from_mbuf(m, NULL, &rxqid);