diff --git a/public/index.php b/public/index.php
index 69523e99..e7713933 100644
--- a/public/index.php
+++ b/public/index.php
@@ -6,7 +6,7 @@ require_once '../misuzu.php';
 $requestPath = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);
 
 if($requestPath !== '/' && $requestPath !== $_SERVER['PHP_SELF']) {
-    require_once MSZ_ROOT . '/public/not-found.php';
+    echo render_error(404);
     return;
 }
 
diff --git a/public/not-found.php b/public/not-found.php
deleted file mode 100644
index 28e25a85..00000000
--- a/public/not-found.php
+++ /dev/null
@@ -1,6 +0,0 @@
-<?php
-namespace Misuzu;
-
-require_once '../misuzu.php';
-
-echo render_error(404);