diff --git a/javasrc/adapter/org/etsi/its/adapter/ports/GnPort.java b/javasrc/adapter/org/etsi/its/adapter/ports/GnPort.java
index af8e5054a7f058a698ad34f7ced8126095e93a47..a95528960367670262492cc08c792088af54cb3d 100644
--- a/javasrc/adapter/org/etsi/its/adapter/ports/GnPort.java
+++ b/javasrc/adapter/org/etsi/its/adapter/ports/GnPort.java
@@ -495,7 +495,10 @@ public class GnPort extends ProtocolPort implements Runnable, IEthernetSpecific
             toBeSent  = ByteHelper.concat(
                 basicHdr,
                 toBeSignedData,
-                new byte[] { 0x01, 0x00, 0x02 }, // Signature header
+                new byte[] { 
+                        (byte)0x00, // Public Key Alg: ecdsa nistp256 with sha256 (0)
+                        (byte)0x02  // ECC Point Type: compressed lsb y-0 (2)
+                    }, // Signature header
                 ByteHelper.extract(signatureBytes, 2, signatureBytes.length - 2)
             );
         } catch (Exception e) {