diff --git a/library/Zend/Math/Rand.php b/library/Zend/Math/Rand.php
index 5719f0f6524..b41624365d8 100644
--- a/library/Zend/Math/Rand.php
+++ b/library/Zend/Math/Rand.php
@@ -152,7 +152,7 @@ public static function getString($length, $charlist = null, $strong = false)
         // charlist is empty or not provided
         if (empty($charlist)) {
             $numBytes = ceil($length * 0.75);
-            $bytes    = static::getBytes($numBytes);
+            $bytes    = static::getBytes($numBytes, $strong);
             return substr(rtrim(base64_encode($bytes), '='), 0, $length);
         }