diff --git a/RTCPeerConnection.js b/RTCPeerConnection.js
index 7647d47da..e085093da 100644
--- a/RTCPeerConnection.js
+++ b/RTCPeerConnection.js
@@ -121,7 +121,7 @@ export default class RTCPeerConnection extends EventTarget(PEER_CONNECTION_EVENT
       } else if (source === 'video') {
         src = { type: 'video' };
       } else {
-        src = { trackId: track.id };
+        src = { source: source.id };
       }
 
       WebRTCModule.peerConnectionAddTransceiver(this._peerConnectionId, {...src, init: { ...init } }, (successful, data) => {