diff --git a/lib/node/fullnode.js b/lib/node/fullnode.js
index aa4925c4..516a7b01 100644
--- a/lib/node/fullnode.js
+++ b/lib/node/fullnode.js
@@ -289,6 +289,7 @@ class FullNode extends Node {
   /**
    * Add transaction to mempool, broadcast.
    * @param {TX} tx
+   * @returns {Promise}
    */
 
   async sendTX(tx) {