diff --git a/src/connector/nodejs/nodetaos/cinterface.js b/src/connector/nodejs/nodetaos/cinterface.js
index 99271844cd09e6c2d076cc1906b6330ec95fdcca..d076beb8c048e885365e82f976de9f135a0d1c27 100644
--- a/src/connector/nodejs/nodetaos/cinterface.js
+++ b/src/connector/nodejs/nodetaos/cinterface.js
@@ -482,14 +482,9 @@ CTaosInterface.prototype.subscribe = function subscribe(connection, restart, top
   catch(err) {
     throw TypeError("topic is expected as a str");
   }
-  // try {
-  //   interval = ref.alloc(ref.types.int, interval);
-  // }
-  // catch(err) {
-  //   throw TypeError("interval is expected as an int");
-  // }
+
   restart = ref.alloc(ref.types.int, restart);
-  //TAOS_SUB *taos_subscribe(TAOS* taos, int restart, const char* topic, const char *sql, TAOS_SUBSCRIBE_CALLBACK fp, void *param, int interval)
+
   let subscription = this.libtaos.taos_subscribe(connection, restart, topic, sql, null, null, interval);
   if (ref.isNull(subscription)) {
     throw new errors.TDError('Failed to subscribe to TDengine | Database: ' + dbOrig + ', Table: ' + tableOrig);