diff --git a/src/vs/workbench/api/browser/mainThreadAuthentication.ts b/src/vs/workbench/api/browser/mainThreadAuthentication.ts
index 748216d23976eece83590c0c89d71818cfc7d99b..ccabaa3af367a8ea76ce32117f5a8a4c4d5fede6 100644
--- a/src/vs/workbench/api/browser/mainThreadAuthentication.ts
+++ b/src/vs/workbench/api/browser/mainThreadAuthentication.ts
@@ -324,7 +324,7 @@ export class MainThreadAuthentication extends Disposable implements MainThreadAu
 		}
 
 		const remoteConnection = this.remoteAgentService.getConnection();
-		if (remoteConnection && remoteConnection.remoteAuthority.startsWith('vsonline') && VSO_ALLOWED_EXTENSIONS.includes(extensionId)) {
+		if (remoteConnection && remoteConnection.remoteAuthority && remoteConnection.remoteAuthority.startsWith('vsonline') && VSO_ALLOWED_EXTENSIONS.includes(extensionId)) {
 			return true;
 		}