1 files changed, 1 insertions, 2 deletions
diff --git a/crypto/src/asn1/x509/TBSCertificateStructure.cs b/crypto/src/asn1/x509/TBSCertificateStructure.cs
index da378391e..8f091087e 100644
--- a/crypto/src/asn1/x509/TBSCertificateStructure.cs
+++ b/crypto/src/asn1/x509/TBSCertificateStructure.cs
@@ -121,8 +121,7 @@ namespace Org.BouncyCastle.Asn1.X509
 
             while (extras > 0)
 			{
-				DerTaggedObject extra = (DerTaggedObject)seq[seqStart + 6 + extras];
-
+                Asn1TaggedObject extra = Asn1TaggedObject.GetInstance(seq[seqStart + 6 + extras]);
 				switch (extra.TagNo)
 				{
 				case 1: