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-rw-r--r--crypto/src/pkix/PkixNameConstraintValidator.cs4
1 files changed, 2 insertions, 2 deletions
diff --git a/crypto/src/pkix/PkixNameConstraintValidator.cs b/crypto/src/pkix/PkixNameConstraintValidator.cs
index 7a9e3f45e..85dac857b 100644
--- a/crypto/src/pkix/PkixNameConstraintValidator.cs
+++ b/crypto/src/pkix/PkixNameConstraintValidator.cs
@@ -79,8 +79,8 @@ namespace Org.BouncyCastle.Pkix
                 // obey RFC 5280 7.1
                 // special treatment of serialNumber for GSMA SGP.22 RSP specification
                 if (subtreeRdn.Count == 1 && dnsRdn.Count == 1
-                    && subtreeRdn.GetFirst().GetType().Equals(SerialNumberOid)
-                    && dnsRdn.GetFirst().GetType().Equals(SerialNumberOid))
+                    && SerialNumberOid.Equals(subtreeRdn.GetFirst().Type)
+                    && SerialNumberOid.Equals(dnsRdn.GetFirst().Type))
                 {
                     if (!Platform.StartsWith(dnsRdn.GetFirst().Value.ToString(), subtreeRdn.GetFirst().Value.ToString()))
                         return false;