diff --git a/inc/envoyer_gamumail.php b/inc/envoyer_gamumail.php
index 17dd884..c3d884f 100644
--- a/inc/envoyer_gamumail.php
+++ b/inc/envoyer_gamumail.php
@@ -114,6 +114,8 @@ function inc_envoyer_gamumail($slug, $destinataires, $options = [], $Tid_doc_pie
 			else {
 				$nom_fichier = basename($Tdocument['fichier']);
 			}
+			include_spip('bigup_fonctions');
+
 			$type_mime = bigup_get_mime_type_extension($extension);
 			$pieces_jointes[] = [
 				'chemin'   => $destination,