diff a/src/java.base/share/classes/java/security/SecureRandom.java b/src/java.base/share/classes/java/security/SecureRandom.java
--- a/src/java.base/share/classes/java/security/SecureRandom.java
+++ b/src/java.base/share/classes/java/security/SecureRandom.java
@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1996, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1996, 2021, 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
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
@@ -176,12 +176,12 @@
      * @serial
      * @since 9
      */
     private final boolean threadSafe;
 
-    /*
-     * The algorithm name of null if unknown.
+    /**
+     * The algorithm name or {@code null} if unknown.
      *
      * @serial
      * @since 1.5
      */
     private String algorithm;
