diff --git a/phpseclib/Crypt/RSA.php b/phpseclib/Crypt/RSA.php
index ba2a8d83..5e55917f 100644
--- a/phpseclib/Crypt/RSA.php
+++ b/phpseclib/Crypt/RSA.php
@@ -188,7 +188,7 @@ class RSA
     /**
      * PKCS#8 formatted private key
      */
-    const PRIVATE_FORMAT_PKCS8 = 8;
+    const PRIVATE_FORMAT_PKCS8 = 3;
     /**#@-*/
 
     /**#@+