diff --git a/workflow/engine/methods/cases/casesMenuLoader.php b/workflow/engine/methods/cases/casesMenuLoader.php
index d9371d60b..7f24922c3 100644
--- a/workflow/engine/methods/cases/casesMenuLoader.php
+++ b/workflow/engine/methods/cases/casesMenuLoader.php
@@ -116,6 +116,9 @@ function getLoadTreeMenuData ()
             }
         }
 
+        //This function generates an xml, so it prevents the output of a badly formed xml 
+        //by cleaning any content prior to this function with ob_clean
+        ob_clean();
         echo $xml->asXML();
         die;
     }