diff --git a/framework/helper.class.php b/framework/helper.class.php
index 3e75bb76a1..1eeaf58e80 100644
--- a/framework/helper.class.php
+++ b/framework/helper.class.php
@@ -239,7 +239,7 @@ class helper extends baseHelper
      * @param  float  $traffic
      * @param  int    $precision
      * @access public
-     * @return float
+     * @return string
      */
     public static function formatKB($traffic, $precision = 2)
     {