--- old/src/java.base/share/classes/sun/security/pkcs10/PKCS10.java	2019-06-28 07:25:05.403411300 +0200
+++ new/src/java.base/share/classes/sun/security/pkcs10/PKCS10.java	2019-06-28 07:25:03.245182300 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1996, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1996, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -32,7 +32,6 @@
 
 import java.security.cert.CertificateException;
 import java.security.*;
-import java.security.spec.AlgorithmParameterSpec;
 
 import java.util.Base64;
 
@@ -237,10 +236,14 @@
          */
         AlgorithmId algId = null;
         try {
-            algId = AlgorithmId.get(signature.getAlgorithm());
+            AlgorithmParameters params = signature.getParameters();
+            algId = params == null
+                    ? AlgorithmId.get(signature.getAlgorithm())
+                    : AlgorithmId.get(params);
         } catch (NoSuchAlgorithmException nsae) {
             throw new SignatureException(nsae);
         }
+
         algId.encode(scratch);     // sig algorithm
         scratch.putBitString(sig);                      // sig