diff --git a/htdocs/core/lib/company.lib.php b/htdocs/core/lib/company.lib.php
index b85d805fe38..774e16e6e68 100644
--- a/htdocs/core/lib/company.lib.php
+++ b/htdocs/core/lib/company.lib.php
@@ -105,6 +105,7 @@ function societe_prepare_head($object)
         }
 
         // Attached files
+        require_once DOL_DOCUMENT_ROOT.'/core/lib/files.lib.php';
         $upload_dir = $conf->societe->multidir_output[$object->entity] . "/" . $object->id;
         $nbFiles = count(dol_dir_list($upload_dir));
         $head[$h][0] = DOL_URL_ROOT.'/societe/document.php?socid='.$object->id;