diff --git a/src/session.c b/src/session.c
index 8f871f815..89f81fde8 100644
--- a/src/session.c
+++ b/src/session.c
@@ -705,6 +705,8 @@ int session_add_conn(struct session *sess, struct connection *conn)
  */
 int session_check_idle_conn(struct session *sess, struct connection *conn)
 {
+	struct server *srv = objt_server(conn->target);
+
 	/* Connection must be attached to session prior to this function call. */
 	BUG_ON(!conn->owner || conn->owner != sess);
 
@@ -715,7 +717,8 @@ int session_check_idle_conn(struct session *sess, struct connection *conn)
 	/* Ensure conn is not already accounted as idle to prevent sess idle count excess increment. */
 	BUG_ON(conn->flags & CO_FL_SESS_IDLE);
 
-	if (sess->idle_conns >= sess->fe->max_out_conns) {
+	if (sess->idle_conns >= sess->fe->max_out_conns ||
+	    (srv && (srv->cur_admin & SRV_ADMF_MAINT))) {
 		session_unown_conn(sess, conn);
 		conn->owner = NULL;
 		return -1;