diff --git a/action/creer_slug.php b/action/creer_slug.php
index a2ff051..ea6a327 100644
--- a/action/creer_slug.php
+++ b/action/creer_slug.php
@@ -1,6 +1,8 @@
 <?php
 if (!defined('_ECRIRE_INC_VERSION')) return;
 
+defined('_GAMUMAIL_PREFIX_SLUG') || define('_GAMUMAIL_PREFIX_SLUG', "slug");
+
 /**
  * créer un slug Gamumail
  *
@@ -30,7 +32,7 @@ function action_creer_slug_dist($slug = null, $opt = [], $ecraser = false){
 		];
 
 		if ($id_slug = objet_inserer('gamumail', null, $set)) {
-			$set = ['slug' => 'slug_'.$id_slug];
+			$set = ['slug' => _GAMUMAIL_PREFIX_SLUG .'_'.$id_slug];
 			sql_updateq('spip_gamumails', $set, 'id_gamumail = '.$id_slug);
 		}
 	} else {