diff --git a/pathauto.services.yml b/pathauto.services.yml
index 748de19..3d3a760 100644
--- a/pathauto.services.yml
+++ b/pathauto.services.yml
@@ -10,7 +10,7 @@ services:
     arguments: ['@config.factory', '@path.alias_storage', '@database','@pathauto.verbose_messenger', '@string_translation']
   pathauto.alias_uniquifier:
     class: Drupal\pathauto\AliasUniquifier
-    arguments: ['@config.factory', '@pathauto.alias_storage_helper','@module_handler', '@router.no_access_checks', '@path.alias_manager']
+    arguments: ['@config.factory', '@pathauto.alias_storage_helper','@module_handler', '@router.route_provider', '@path.alias_manager']
   pathauto.verbose_messenger:
     class: Drupal\pathauto\VerboseMessenger
     arguments: ['@config.factory', '@current_user']
diff --git a/src/AliasUniquifier.php b/src/AliasUniquifier.php
index 902a03e..9527e9a 100644
--- a/src/AliasUniquifier.php
+++ b/src/AliasUniquifier.php
@@ -12,9 +12,7 @@ use Drupal\Core\Config\ConfigFactoryInterface;
 use Drupal\Core\Extension\ModuleHandlerInterface;
 use Drupal\Core\Language\LanguageInterface;
 use Drupal\Core\Path\AliasManagerInterface;
-use Drupal\Core\Path\AliasStorageInterface;
-use Symfony\Component\Routing\Exception\ResourceNotFoundException;
-use Symfony\Component\Routing\Matcher\UrlMatcherInterface;
+use Drupal\Core\Routing\RouteProviderInterface;
 
 /**
  * Provides a utility for creating a unique path alias.
@@ -43,11 +41,11 @@ class AliasUniquifier implements AliasUniquifierInterface {
   protected $moduleHandler;
 
   /**
-   * The url matcher service.
+   * The route provider service.
    *
-   * @var \Symfony\Component\Routing\Matcher\UrlMatcherInterface
+   * @var \Drupal\Core\Routing\RouteProviderInterface.
    */
-  protected $urlMatcher;
+  protected $routeProvider;
 
   /**
    * The alias manager.
@@ -57,15 +55,6 @@ class AliasUniquifier implements AliasUniquifierInterface {
   protected $aliasManager;
 
   /**
-   * Stores the last matching route name.
-   *
-   * Used to prevent a loop if the same route matches a given pattern.
-   *
-   * @var
-   */
-  protected $lastRouteName;
-
-  /**
    * Creates a new AliasUniquifier.
    *
    * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
@@ -74,14 +63,14 @@ class AliasUniquifier implements AliasUniquifierInterface {
    *   The alias storage helper.
    * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
    *   The module handler.
-   * @param \Symfony\Component\Routing\Matcher\UrlMatcherInterface $url_matcher
+   * @param \Drupal\Core\Routing\RouteProviderInterface $route_provider
    *   The url matcher service.
    */
-  public function __construct(ConfigFactoryInterface $config_factory, AliasStorageHelperInterface $alias_storage_helper, ModuleHandlerInterface $module_handler, UrlMatcherInterface $url_matcher, AliasManagerInterface $alias_manager) {
+  public function __construct(ConfigFactoryInterface $config_factory, AliasStorageHelperInterface $alias_storage_helper, ModuleHandlerInterface $module_handler, RouteProviderInterface $route_provider, AliasManagerInterface $alias_manager) {
     $this->configFactory = $config_factory;
     $this->aliasStorageHelper = $alias_storage_helper;
     $this->moduleHandler = $module_handler;
-    $this->urlMatcher = $url_matcher;
+    $this->routeProvider = $route_provider;
     $this->aliasManager = $alias_manager;
   }
 
@@ -118,6 +107,7 @@ class AliasUniquifier implements AliasUniquifierInterface {
       if ($existing_source != $alias) {
         // If it is an alias for the provided source, it is allowed to keep using
         // it. If not, then it is reserved.
+        $this->lastRouteName = NULL;
         return $existing_source != $source;
       }
 
@@ -167,20 +157,17 @@ class AliasUniquifier implements AliasUniquifierInterface {
       return TRUE;
     }
 
-    try {
-      $route = $this->urlMatcher->match($path);
+    $routes = $this->routeProvider->getRoutesByPattern($path);
 
-      if ($route['_route'] == $this->lastRouteName) {
-        throw new \InvalidArgumentException('The path "' . $path . '" collides with the route with identifier ' . $this->lastRouteName . ', whose path is ' . $route['_route_object']->getPath());
+    // Only return true for an exact match, ignore placeholders.
+    foreach ($routes as $route) {
+      if ($route->getPath() == $path) {
+        return TRUE;
       }
-
-      $this->lastRouteName = $route['_route'];
-      return TRUE;
-    }
-    catch (ResourceNotFoundException $e) {
-      $this->lastRouteName = NULL;
-      return FALSE;
     }
+
+    return FALSE;
+
   }
 
 }