--- a/jdk/src/java.base/share/classes/java/security/MessageDigest.java	Mon Oct 19 17:26:01 2015 -0700
+++ b/jdk/src/java.base/share/classes/java/security/MessageDigest.java	Mon Oct 19 17:35:18 2015 -0700
@@ -146,6 +146,13 @@
      * <p> Note that the list of registered providers may be retrieved via
      * the {@link Security#getProviders() Security.getProviders()} method.
      *
+     * @implNote
+     * The JDK Reference Implementation additionally uses the
+     * {@code jdk.security.provider.preferred} property to determine
+     * the preferred provider order for the specified algorithm. This
+     * may be different than the order of providers returned by
+     * {@link Security#getProviders() Security.getProviders()}.
+     *
      * @param algorithm the name of the algorithm requested.
      * See the MessageDigest section in the <a href=
      * "{@docRoot}/../technotes/guides/security/StandardNames.html#MessageDigest">