diff --git a/core/class/mqtt2.class.php b/core/class/mqtt2.class.php
index ff7eb2b..0a0e30f 100644
--- a/core/class/mqtt2.class.php
+++ b/core/class/mqtt2.class.php
@@ -623,8 +623,13 @@ public static function getFormatedInfos() {
          $infos['port'] = config::byKey('remote::port', __CLASS__);
          $infos['protocol'] = config::byKey('remote::protocol', __CLASS__);
       }
-      $infos['user'] = $authentifications[0];
-      $infos['password'] = $authentifications[1];
+      if(count($authentifications) == 2){
+         $infos['user'] = $authentifications[0];
+         $infos['password'] = $authentifications[1];
+      }else{
+         $infos['user'] = "";
+         $infos['password'] = "";
+      }
       return $infos;
    }