diff --git a/include/utils/VtlibUtils.php b/include/utils/VtlibUtils.php
index 94e9b94c233c1b0f57c79050482c7d23fbee3a28..12b068873b3de9774376438c83da1e4ee2093b96 100644
--- a/include/utils/VtlibUtils.php
+++ b/include/utils/VtlibUtils.php
@@ -695,7 +695,7 @@ function vtlib_purify($input, $ignore = false) {
                 'data' => true
             );
 
-            include_once ('libraries/htmlpurifier410/library/HTMLPurifier.auto.php');
+            include_once __DIR__ . '/../../libraries/htmlpurifier410/library/HTMLPurifier.auto.php';
 
             $config = HTMLPurifier_Config::createDefault();
             $config->set('Core.Encoding', $use_charset);
diff --git a/kcfinder/core/uploader.php b/kcfinder/core/uploader.php
index 42059a6e293457f0d943fe7facc755c6381e54a6..5bc1b968c2511737004d96d3001de65e8b508b06 100644
--- a/kcfinder/core/uploader.php
+++ b/kcfinder/core/uploader.php
@@ -12,6 +12,9 @@
   *      @link http://kcfinder.sunhater.com
   */
 
+require_once __DIR__ . '/../../include/utils/VtlibUtils.php';
+require_once __DIR__ . '/../../vtlib/Vtiger/Functions.php';
+
 class uploader {
     protected $config = array();
     protected $opener = array();