diff --git a/src/vitis/vas/rest/class/vmlib/files/Files_manager.class.inc b/src/vitis/vas/rest/class/vmlib/files/Files_manager.class.inc
index 7f6e6c99528102527c61f6b036ba256fc72c3d93..81dbcc40301fc5f618f92b00584430cfd19a4d7a 100644
--- a/src/vitis/vas/rest/class/vmlib/files/Files_manager.class.inc
+++ b/src/vitis/vas/rest/class/vmlib/files/Files_manager.class.inc
@@ -503,6 +503,8 @@ class Files_manager{
      *@param $mId Id of the current object.
      *@param $sField field name (generally DB column name).
      *@param $sContainer folder between $sObject and $mId
+     *@param $aFilesToDelete array of files names to delete, false to delete all the files
+     *@param $aExceptions array of files names to preserve, false to delete all the files
      *@return true if the disrectory has benn cleaned
      */
     public function cleanWsDataDir($sModule, $sObject, $mId, $sField, $sContainer = "", $aFilesToDelete = false, $aExceptions = false){