diff --git a/inc/offline.php b/inc/offline.php
index f79d72fe398176670fe021c24a9412541483e640..d77a2222ee3f2ec74ed0fb3dafa78fc6bfccd4d1 100644
--- a/inc/offline.php
+++ b/inc/offline.php
@@ -33,12 +33,13 @@ function offline_cache_hash($version_editoriale) {
 	return substr(md5($s),0,8);
 }
 
+
 /**
  * Retrouver l'URL relative du site (ou rien si ca n'en est pas une)
  * @param $url
  * @return bool|string
  */
-function offline_url_relative($url) {
+function offline_url_publique_relative($url) {
 	if (strpos($url, '//') === 0) {
 		$url = 'https:' . $url;
 	}
@@ -108,7 +109,7 @@ function offline_url_404_offline() {
 
 	$url_offline_404 = '';
 	if (isset($c['url_offline_404']) and $c['url_offline_404']) {
-		$url_offline_404 = offline_url_relative($c['url_offline_404']);
+		$url_offline_404 = offline_url_publique_relative($c['url_offline_404']);
 	}
 	if (!$url_offline_404) {
 		$url_offline_404 = generer_url_public('404_offline');
@@ -186,7 +187,7 @@ function offline_config_js($refresh = false) {
 		}
 
 
-		$config['swUrl'] = (_DIR_RACINE ? _DIR_RACINE : './'). "offline.api.sw.js";
+		$config['swUrl'] = offline_url_publique_relative(url_absolue(_DIR_RACINE  . "offline.api.sw.js"));
 		$config['swOptions'] = array();
 		$config['cacheName'] = 'offline-' . offline_cache_hash(isset($c['version_cache_edito']) ? $c['version_cache_edito'] : '');
 		$config['debug'] = (defined('_OFFLINE_DEBUG') ? _OFFLINE_DEBUG : false);