diff --git a/example_script.js b/example_script.js
index 5b8483e..4ec220a 100644
--- a/example_script.js
+++ b/example_script.js
@@ -34,7 +34,7 @@ var client = new plivo.Client('MAMDJMMTEZOWY0ZMQWM2', 'OTljNmVmOGVkNGZhNjJlOWIyM
 //   console.error(err);
 // });
 
-client.multiPartyCalls.addParticipant('agent', {"friendlyName" : "TestMPC", 'from' : '+919090909090', 'to': 'sip:koushikqa119062465586783372208@phone-qa.voice.plivodev.com'}).then(function (response) {
+client.multiPartyCalls.addParticipant('agent', {'friendlyName' : 'TestMPC', 'from' : '+919090909090', 'to': 'sip:koushikqa119062465586783372208@phone-qa.voice.plivodev.com'}).then(function (response) {
   console.log(response);
 }, function (err) {
   console.error(err);
diff --git a/lib/resources/multiPartyCall.js b/lib/resources/multiPartyCall.js
index 9a049ef..1911b04 100644
--- a/lib/resources/multiPartyCall.js
+++ b/lib/resources/multiPartyCall.js
@@ -478,6 +478,7 @@ export class MultiPartyCallInterface extends PlivoResourceInterface{
     let mpcId = this.makeMpcId(params.uuid, params.friendlyName)
     delete params.uuid
     delete params.friendlyName
+    params.role = role
     return new MultiPartyCall(this[clientKey], {id: mpcId[0] + mpcId[1]}).addParticipant(params)
   }