1 files changed, 2 insertions, 0 deletions
diff --git a/crypto/src/asn1/x509/KeyPurposeId.cs b/crypto/src/asn1/x509/KeyPurposeId.cs
index 4b48a9b51..1a564b97a 100644
--- a/crypto/src/asn1/x509/KeyPurposeId.cs
+++ b/crypto/src/asn1/x509/KeyPurposeId.cs
@@ -32,5 +32,7 @@ namespace Org.BouncyCastle.Asn1.X509
         // microsoft key purpose ids
         //
         public static readonly KeyPurposeID IdKPSmartCardLogon = new KeyPurposeID("1.3.6.1.4.1.311.20.2.2");
+
+        public static readonly KeyPurposeID IdKPMacAddress = new KeyPurposeID("1.3.6.1.1.1.1.22");
     }
 }