diff --git a/model/Shell.php b/model/Shell.php
index 8a2de2b8..3d2bece6 100644
--- a/model/Shell.php
+++ b/model/Shell.php
@@ -92,6 +92,11 @@ class Shell {
      */
     public $name;
 
+    /**
+     * @param string
+     */
+    public $handler_to_use;
+
     /**
      *  Constructs this Shell instance.
      *