diff --git a/lib/php/src/server/TForkingServer.php b/lib/php/src/server/TForkingServer.php
index 10635d0..e2370cb 100644
--- a/lib/php/src/server/TForkingServer.php
+++ b/lib/php/src/server/TForkingServer.php
@@ -20,7 +20,7 @@
    *
    * @var array
    */
-  private $children_ = array();
+  protected $children_ = array();
 
   /**
    * Listens for new client using the supplied