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-rw-r--r--crypto/src/asn1/DerUniversalString.cs2
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/src/asn1/DerUniversalString.cs b/crypto/src/asn1/DerUniversalString.cs
index d65121ab0..fc031ecf5 100644
--- a/crypto/src/asn1/DerUniversalString.cs
+++ b/crypto/src/asn1/DerUniversalString.cs
@@ -40,7 +40,7 @@ namespace Org.BouncyCastle.Asn1
             if (obj is DerUniversalString derUniversalString)
                 return derUniversalString;
 
-            if (obj is IAsn1Convertible asn1Convertible)
+            if (obj is IAsn1Convertible asn1Convertible && !(obj is Asn1Object))
             {
                 Asn1Object asn1Object = asn1Convertible.ToAsn1Object();
                 if (asn1Object is DerUniversalString converted)