diff --git a/app.js b/app.js
index 242c464..200b653 100644
--- a/app.js
+++ b/app.js
@@ -112,9 +112,9 @@ const closeCall = (callId) => {
     if (videoCalls[callId]) {
       videoCalls[callId].producer?.close();
       videoCalls[callId].consumer?.close();
-      videoCalls[callId]?.consumerTransport.close();
-      videoCalls[callId]?.producerTransport.close();
-      videoCalls[callId].router.close();
+      videoCalls[callId]?.consumerTransport?.close();
+      videoCalls[callId]?.producerTransport?.close();
+      videoCalls[callId]?.router?.close();
       delete videoCalls[callId];
     } else {
       console.log(`The call with id ${callId} has already been deleted`);