diff --git a/htdocs/api/class/api_documents.class.php b/htdocs/api/class/api_documents.class.php
index ee0ae57e0e2..059802e9e88 100644
--- a/htdocs/api/class/api_documents.class.php
+++ b/htdocs/api/class/api_documents.class.php
@@ -403,7 +403,7 @@ class Documents extends DolibarrApi
 				throw new RestException(404, 'Purchase order not found');
 			}
 
-			$upload_dir = $conf->fournisseur->dir_output."/facture/".get_exdir($object->id, 2, 0, 0, $object, 'invoice_supplier').dol_sanitizeFileName($object->ref);
+			$upload_dir = $conf->fournisseur->dir_output."/commande/".dol_sanitizeFileName($object->ref);
 		} elseif ($modulepart == 'shipment' || $modulepart == 'expedition') {
 			require_once DOL_DOCUMENT_ROOT.'/expedition/class/expedition.class.php';