diff --git a/kamailio/default.cfg b/kamailio/default.cfg
index 637cc71..291d843 100644
--- a/kamailio/default.cfg
+++ b/kamailio/default.cfg
@@ -487,7 +487,7 @@ route[PREPARE_INITIAL_REQUESTS]
         if (t_check_trans()) {
             route(RELAY);
         } else {
-            sl_send_reply("481", "Call leg/transaction does not exist");
+            send_reply("481", "Call leg/transaction does not exist");
         }
         exit();
     } else if (is_method("ACK")) {