diff --git a/lib/devtools.js b/lib/devtools.js
index e4f6d30..07ec20f 100644
--- a/lib/devtools.js
+++ b/lib/devtools.js
@@ -211,7 +211,7 @@ customElements.define('developer-tooling', class extends HTMLElement {
     }
 
     if (this.port) {
-      this.root.querySelector('#server-location').textContent = `location:${this.port}`
+      this.root.querySelector('#server-location').textContent = `localhost:${this.port}`
       this.root.querySelector('#server-message').classList.remove('hidden')
     }
   }