diff --git a/phpseclib/Math/BigInteger.php b/phpseclib/Math/BigInteger.php
index f7532edf..2366bae9 100644
--- a/phpseclib/Math/BigInteger.php
+++ b/phpseclib/Math/BigInteger.php
@@ -3057,8 +3057,6 @@ class Math_BigInteger {
             $min = $temp;
         }
 
-        $generator = $this->generator;
-
         $max = $max->subtract($min);
         $max = ltrim($max->toBytes(), chr(0));
         $size = strlen($max) - 1;