diff --git a/workflow/engine/classes/class.derivation.php b/workflow/engine/classes/class.derivation.php
index aa039c0ed..074131d0a 100755
--- a/workflow/engine/classes/class.derivation.php
+++ b/workflow/engine/classes/class.derivation.php
@@ -80,7 +80,7 @@ class Derivation
      *
      * @return array Return array
      */
-    protected function prepareInformationTask(array $arrayTaskData)
+    private function prepareInformationTask(array $arrayTaskData)
     {
         try {
             $task = new Task();