diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4cab833..fdbcfd7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,10 @@ follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ## [Unreleased]
 
+- Fix a fatal `Call to undefined method ...::mount()` error for screens that
+define no `mount()`: the web boot lifecycle now calls the guarded core
+entrypoint `mountComponent()` instead of invoking `mount()` directly
+(parity with `NativeRouter`).
 - Fix browser input and action events on NativePHP versions that expose
   `dispatchUiEvent()`, retaining the legacy dispatcher for older versions.
 
diff --git a/src/Protocol/WebScreenRunner.php b/src/Protocol/WebScreenRunner.php
index f0ea8e7..59ab2c2 100644
--- a/src/Protocol/WebScreenRunner.php
+++ b/src/Protocol/WebScreenRunner.php
@@ -438,7 +438,7 @@ protected static function boot(string $componentClass, array $params, ?string $l
         // still needed to render the placeholder, but mount() — the slow
         // work being deferred — is skipped until the {type:'lazy'} update.
         if ($mount) {
-            $component->mount();
+            $component->mountComponent();
         }
 
         return $component;