diff --git a/phpseclib/Crypt/RSA/PrivateKey.php b/phpseclib/Crypt/RSA/PrivateKey.php
index 6edd366d..84cede8e 100644
--- a/phpseclib/Crypt/RSA/PrivateKey.php
+++ b/phpseclib/Crypt/RSA/PrivateKey.php
@@ -49,7 +49,7 @@ class PrivateKey extends RSA implements Common\PrivateKey
     protected $coefficients;
 
     /**
-     * Public Exponent
+     * Private Exponent
      *
      * @var \phpseclib3\Math\BigInteger
      */