diff --git a/flight/net/Router.php b/flight/net/Router.php
index 26f8e84..2d4d454 100644
--- a/flight/net/Router.php
+++ b/flight/net/Router.php
@@ -35,6 +35,13 @@ class Router {
      */
     public $params = array();
 
+    /**
+     * Matching regular expression.
+     *
+     * @var string
+     */
+    public $regex = null;
+
     /**
      * Gets mapped routes.
      *
@@ -116,6 +123,7 @@ class Router {
             }
 
             $this->matched = $pattern;
+            $this->regex = $regex;
 
             return true;
         }