diff --git a/phpseclib/File/X509.php b/phpseclib/File/X509.php
index cf342472..8811f68c 100644
--- a/phpseclib/File/X509.php
+++ b/phpseclib/File/X509.php
@@ -160,6 +160,7 @@ class File_X509
     var $AuthorityKeyIdentifier;
     var $CertificatePolicies;
     var $AuthorityInfoAccessSyntax;
+    var $SubjectInfoAccessSyntax;
     var $SubjectAltName;
     var $SubjectDirectoryAttributes;
     var $PrivateKeyUsagePeriod;