diff --git a/src/mibew/libs/classes/Mibew/EventDispatcher/Events.php b/src/mibew/libs/classes/Mibew/EventDispatcher/Events.php
index 752f6027..857285f4 100644
--- a/src/mibew/libs/classes/Mibew/EventDispatcher/Events.php
+++ b/src/mibew/libs/classes/Mibew/EventDispatcher/Events.php
@@ -230,6 +230,18 @@ final class Events
      */
     const RESOURCE_NOT_FOUND = 'resourceNotFound';
 
+    /**
+     * Routes collection is loaded and ready to use.
+     *
+     * This event is triggered after all routes are loaded. It provides an
+     * ability for plugins to alter routes collection before it will be used. An
+     * associative array with the following items is passed to the event
+     * handlers:
+     *  - "routes" an instance of
+     *    {@link Symfony\Component\Routing\RouteCollection} class.
+     */
+    const ROUTES_ALTER = 'routesAlter';
+
     /**
      * Thread is updated.
      *
diff --git a/src/mibew/libs/classes/Mibew/Routing/RouteCollectionLoader.php b/src/mibew/libs/classes/Mibew/Routing/RouteCollectionLoader.php
index d3885a33..626c6c90 100644
--- a/src/mibew/libs/classes/Mibew/Routing/RouteCollectionLoader.php
+++ b/src/mibew/libs/classes/Mibew/Routing/RouteCollectionLoader.php
@@ -21,6 +21,7 @@ namespace Mibew\Routing;
 
 use Mibew\Plugin\Manager as PluginManager;
 use Mibew\EventDispatcher\EventDispatcher;
+use Mibew\EventDispatcher\Events;
 use Symfony\Component\Routing\Loader\YamlFileLoader;
 use Symfony\Component\Routing\RouteCollection;
 use Symfony\Component\Config\FileLocatorInterface;
@@ -91,7 +92,7 @@ class RouteCollectionLoader
 
         // Add an ability for plugins to alter routes list
         $arguments = array('routes' => $collection);
-        EventDispatcher::getInstance()->triggerEvent('routesAlter', $arguments);
+        EventDispatcher::getInstance()->triggerEvent(Events::ROUTES_ALTER, $arguments);
 
         return $arguments['routes'];
     }