diff --git a/GeneXusXmlSignature/src/main/java/com/genexus/dsig/XmlDSigSigner.java b/GeneXusXmlSignature/src/main/java/com/genexus/dsig/XmlDSigSigner.java
index cf72727..be9b8ee 100644
--- a/GeneXusXmlSignature/src/main/java/com/genexus/dsig/XmlDSigSigner.java
+++ b/GeneXusXmlSignature/src/main/java/com/genexus/dsig/XmlDSigSigner.java
@@ -371,6 +371,7 @@ private String Sign(Document xmlInput, PrivateKeyManager key, CertificateX509 ce
 			try {
 				X509Certificate x509Certificate = certificate.Cert();
 				X509Data x509data = new X509Data(sig.getDocument());
+				x509data.addIssuerSerial(x509Certificate.getIssuerDN().getName(), x509Certificate.getSerialNumber());			
 				x509data.addSubjectName(x509Certificate);
 				x509data.addCertificate(x509Certificate);
 				sig.getKeyInfo().add(x509data);