diff --git a/asn1x509-1.0.js b/asn1x509-1.0.js
index 8ca0b1db..af20504d 100644
--- a/asn1x509-1.0.js
+++ b/asn1x509-1.0.js
@@ -1819,6 +1819,7 @@ KJUR.asn1.x509.OID = new function(params) {
         'ST':   '2.5.4.8',
         'L':    '2.5.4.7',
         'CN':   '2.5.4.3',
+        'SN':   '2.5.4.4',
         'DN':   '2.5.4.49',
         'DC':   '0.9.2342.19200300.100.1.25',
     };