diff --git a/core/class/mqtt2.class.php b/core/class/mqtt2.class.php
index 58ee8dd..fd78d13 100644
--- a/core/class/mqtt2.class.php
+++ b/core/class/mqtt2.class.php
@@ -495,6 +495,9 @@ public static function deamon_start() {
       $mqtt2_path = realpath(dirname(__FILE__) . '/../../resources/mqtt2d');
       chdir($mqtt2_path);
       $authentifications = explode(':', explode("\n", config::byKey('mqtt::password', __CLASS__))[0]);
+      if (count($authentifications) != 2) {
+         throw new Exception(__('Aucune autentification trouvée, impossible de lancer le démon', __FILE__));
+      }
       $cmd = system::getCmdSudo() . ' /usr/bin/node ' . $mqtt2_path . '/mqtt2d.js';
       $cmd .= ' --loglevel ' . log::convertLogLevel(log::getLogLevel(__CLASS__));
       $cmd .= ' --socketport ' . config::byKey('socketport', __CLASS__);