diff --git a/htdocs/fourn/facture/paiement.php b/htdocs/fourn/facture/paiement.php
index c94a1f95272..8a7e0cc8054 100644
--- a/htdocs/fourn/facture/paiement.php
+++ b/htdocs/fourn/facture/paiement.php
@@ -37,6 +37,7 @@ require_once DOL_DOCUMENT_ROOT.'/fourn/class/fournisseur.facture.class.php';
 require_once DOL_DOCUMENT_ROOT.'/fourn/class/paiementfourn.class.php';
 require_once DOL_DOCUMENT_ROOT.'/core/class/html.formother.class.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/date.lib.php';
+require_once DOL_DOCUMENT_ROOT.'/core/lib/files.lib.php';
 
 // Load translation files required by the page
 $langs->loadLangs(array('companies', 'bills', 'banks', 'compta'));