diff --git a/third_party/tcplp/bsdtcp/tcp_input.c b/third_party/tcplp/bsdtcp/tcp_input.c
index 9f87f7f8d..acd933cde 100644
--- a/third_party/tcplp/bsdtcp/tcp_input.c
+++ b/third_party/tcplp/bsdtcp/tcp_input.c
@@ -766,7 +766,7 @@ tcp_input(struct ip6_hdr* ip6, struct tcphdr* th, otMessage* msg, struct tcpcb*
 		 */
 
 		tcp_dooptions(&to, optp, optlen, TO_SYN);
-		tp = tcplp_sys_accept_ready(tpl, &ip6->ip6_dst, th->th_sport); // Try to allocate an active socket to accept into
+		tp = tcplp_sys_accept_ready(tpl, &ip6->ip6_src, th->th_sport); // Try to allocate an active socket to accept into
 		if (tp == NULL) {
 			/* If we couldn't allocate, just ignore the SYN. */
 			return IPPROTO_DONE;