diff --git a/coordinator/ts/main.ts b/coordinator/ts/main.ts
index bd8bc9a49c..43df66514d 100644
--- a/coordinator/ts/main.ts
+++ b/coordinator/ts/main.ts
@@ -39,7 +39,7 @@ async function bootstrap() {
   const document = SwaggerModule.createDocument(app, config);
   SwaggerModule.setup("api", app, document);
 
-  await app.listen(process.env.COORDINATOR_PORT ?? 3000);
+  await app.listen(process.env.COORDINATOR_PORT || 3000);
 }
 
 bootstrap();