diff --git a/Stack/Opc.Ua.Core/Security/Certificates/Nonce.cs b/Stack/Opc.Ua.Core/Security/Certificates/Nonce.cs
index ca9ee8d33..37bad43a6 100644
--- a/Stack/Opc.Ua.Core/Security/Certificates/Nonce.cs
+++ b/Stack/Opc.Ua.Core/Security/Certificates/Nonce.cs
@@ -312,6 +312,8 @@ public static uint GetNonceLength(string securityPolicyUri)
         {
             switch (securityPolicyUri)
             {
+                case SecurityPolicies.Basic128Rsa15:
+                    return 16;
                 case SecurityPolicies.Basic256:
                 case SecurityPolicies.Basic256Sha256:
                 case SecurityPolicies.Aes128_Sha256_RsaOaep: