1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/src/asn1/x509/PrivateKeyUsagePeriod.cs b/crypto/src/asn1/x509/PrivateKeyUsagePeriod.cs
index a87c2ee9e..2ca1557bc 100644
--- a/crypto/src/asn1/x509/PrivateKeyUsagePeriod.cs
+++ b/crypto/src/asn1/x509/PrivateKeyUsagePeriod.cs
@@ -66,7 +66,7 @@ namespace Org.BouncyCastle.Asn1.X509
 
         public override Asn1Object ToAsn1Object()
         {
-            Asn1EncodableVector v = new Asn1EncodableVector();
+            Asn1EncodableVector v = new Asn1EncodableVector(2);
             v.AddOptionalTagged(false, 0, _notBefore);
             v.AddOptionalTagged(false, 1, _notAfter);
             return new DerSequence(v);