diff --git a/phpseclib/Math/BigInteger.php b/phpseclib/Math/BigInteger.php
index 4ac35be1..d0d66e53 100644
--- a/phpseclib/Math/BigInteger.php
+++ b/phpseclib/Math/BigInteger.php
@@ -1628,7 +1628,7 @@ class Math_BigInteger {
             $RSAPublicKey = chr(3) . $this->_encodeASN1Length(strlen($RSAPublicKey)) . $RSAPublicKey;
 
             $encapsulated = pack('Ca*a*',
-                CRYPT_RSA_ASN1_SEQUENCE, $this->_encodeASN1Length(strlen($rsaOID . $RSAPublicKey)), $rsaOID . $RSAPublicKey
+                48, $this->_encodeASN1Length(strlen($rsaOID . $RSAPublicKey)), $rsaOID . $RSAPublicKey
             );
 
             $RSAPublicKey = "-----BEGIN PUBLIC KEY-----\r\n" .