diff --git a/core/lib/Drupal/Core/Path/PathMatcher.php b/core/lib/Drupal/Core/Path/PathMatcher.php
index fada60a..9a8a7bf 100644
--- a/core/lib/Drupal/Core/Path/PathMatcher.php
+++ b/core/lib/Drupal/Core/Path/PathMatcher.php
@@ -29,13 +29,20 @@ class PathMatcher implements PathMatcherInterface {
   protected $regexes;
 
   /**
+   * The config factory service.
+   *
+   * @var \Drupal\Core\Config\ConfigFactoryInterface
+   */
+  protected $configFactory;
+
+  /**
    * Creates a new PathMatcher.
    *
    * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
    *   The config factory.
    */
   public function __construct(ConfigFactoryInterface $config_factory) {
-    $this->frontPage = $config_factory->get('system.site')->get('page.front');
+    $this->configFactory = $config_factory;
   }
 
   /**
@@ -44,7 +51,12 @@ public function __construct(ConfigFactoryInterface $config_factory) {
   public function matchPath($path, array $patterns) {
     // Convert array to a string for easier find and replace.
     $pattern_string = implode("\n", $patterns);
+
     if (!isset($this->regexes[$pattern_string])) {
+      // Lazy-load front page config.
+      if (!isset($this->frontPage)) {
+        $this->frontPage = $this->configFactory->get('system.site')->get('page.front');
+      }
       // Convert path settings to a regular expression.
       $to_replace = array(
         // Replace newlines with a logical 'or'.