diff --git a/phpseclib/Crypt/RSA.php b/phpseclib/Crypt/RSA.php
index 9ae9f32d..9369d437 100644
--- a/phpseclib/Crypt/RSA.php
+++ b/phpseclib/Crypt/RSA.php
@@ -209,7 +209,7 @@ define('CRYPT_RSA_PRIVATE_FORMAT_XML', 2);
 /**
  * PKCS#8 formatted private key
  */
-define('CRYPT_RSA_PRIVATE_FORMAT_PKCS8', 3);
+define('CRYPT_RSA_PRIVATE_FORMAT_PKCS8', 8);
 /**#@-*/
 
 /**#@+