1 files changed, 1 insertions, 1 deletions

diff --git a/crypto/src/asn1/isismtt/x509/DeclarationOfMajority.cs b/crypto/src/asn1/isismtt/x509/DeclarationOfMajority.cs

index c4ebb2b72..b82c9373d 100644
--- a/crypto/src/asn1/isismtt/x509/DeclarationOfMajority.cs
+++ b/crypto/src/asn1/isismtt/x509/DeclarationOfMajority.cs
@@ -134,7 +134,7 @@ namespace Org.BouncyCastle.Asn1.IsisMtt.X509
 				switch ((Choice) declaration.TagNo)
 				{
 					case Choice.NotYoungerThan:
-						return DerInteger.GetInstance(declaration, false).Value.IntValue;
+                        return DerInteger.GetInstance(declaration, false).IntValueExact;
 					default:
 						return -1;
 				}