1 files changed, 1 insertions, 1 deletions

diff --git a/crypto/src/security/SignerUtilities.cs b/crypto/src/security/SignerUtilities.cs

index edae3b095..0cf113f65 100644
--- a/crypto/src/security/SignerUtilities.cs
+++ b/crypto/src/security/SignerUtilities.cs
@@ -357,7 +357,7 @@ namespace Org.BouncyCastle.Security
 
             if (mechanism.Equals("RSA"))
             {
-                return (new RsaDigestSigner(new NullDigest()));
+                return (new RsaDigestSigner(new NullDigest(), (AlgorithmIdentifier)null));
             }
             if (mechanism.Equals("MD2withRSA"))
             {