diff --git a/index.php b/index.php
index d658951..3cf7ea3 100644
--- a/index.php
+++ b/index.php
@@ -6,6 +6,8 @@
  * Date: 2017-12-23
  */
 
+define("_DEF_VSPF_", true);
+
 // including vendor autoloader
 include_once('./vendor/autoload.php');