diff --git a/src/backend.c b/src/backend.c
index a3ec782..f87e36e 100644
--- a/src/backend.c
+++ b/src/backend.c
@@ -1355,6 +1355,9 @@
 		 */
 		if (srv->max_used_conns < srv->curr_used_conns)
 			srv->max_used_conns = srv->curr_used_conns;
+
+		if (srv->est_need_conns < srv->curr_used_conns)
+			srv->est_need_conns = srv->curr_used_conns;
 	}
 	if (!srv_conn || !sockaddr_alloc(&srv_conn->dst)) {
 		if (srv_conn)