diff --git a/action/creer_slug.php b/action/creer_slug.php
index ea6a327..d1a0b57 100644
--- a/action/creer_slug.php
+++ b/action/creer_slug.php
@@ -32,7 +32,8 @@ function action_creer_slug_dist($slug = null, $opt = [], $ecraser = false){
 		];
 
 		if ($id_slug = objet_inserer('gamumail', null, $set)) {
-			$set = ['slug' => _GAMUMAIL_PREFIX_SLUG .'_'.$id_slug];
+			$slug = getSlugGamumail($id_slug);
+			$set = ['slug' => $slug];
 			sql_updateq('spip_gamumails', $set, 'id_gamumail = '.$id_slug);
 		}
 	} else {
@@ -59,3 +60,16 @@ function action_creer_slug_dist($slug = null, $opt = [], $ecraser = false){
 	include_spip('inc/invalideur');
 	suivre_invalideur("id='id_gamumail/1'");
 }
+
+function getSlugGamumail(int $id_gamumail, int|null $suffix = 0):string {
+	$slug = _GAMUMAIL_PREFIX_SLUG .'_'.$id_gamumail;
+	if ($suffix) {
+		$slug .= '_'.$suffix;
+	}
+	if (sql_countsel('spip_gamumails', ['slug='.sql_quote($slug)])) {
+		$suffix++;
+		return getSlugGamumail($id_gamumail, $suffix);
+	}
+	return $slug;
+}
+