diff --git a/packages/astro/src/core/app/node.ts b/packages/astro/src/core/app/node.ts
index 18999e141cf8b..02803bf225542 100644
--- a/packages/astro/src/core/app/node.ts
+++ b/packages/astro/src/core/app/node.ts
@@ -88,7 +88,7 @@ export class NodeApp extends App {
 			forwardedPort ??  (isEncrypted ? '443' : '80');
 
 		const portInHostname = typeof hostname === 'string' && /:\d+$/.test(hostname);
-		const hostnamePort = portInHostname ? hostname : `${hostname}${port ? `:${port}` : ''}`;
+		const hostnamePort = portInHostname ? hostname : `${hostname}${port}`;
 		
 		const url = `${protocol}://${hostnamePort}${req.url}`;
 		const options: RequestInit = {