diff --git a/src/main/java/com/github/shyiko/mysql/binlog/network/protocol/command/AuthenticateCommand.java b/src/main/java/com/github/shyiko/mysql/binlog/network/protocol/command/AuthenticateCommand.java
index a045fe24..0e014a1a 100644
--- a/src/main/java/com/github/shyiko/mysql/binlog/network/protocol/command/AuthenticateCommand.java
+++ b/src/main/java/com/github/shyiko/mysql/binlog/network/protocol/command/AuthenticateCommand.java
@@ -82,6 +82,9 @@ public byte[] toByteArray() throws IOException {
     public static byte[] passwordCompatibleWithMySQL411(String password, String salt) {
         MessageDigest sha;
         try {
+            /** 
+            * recommend sha = MessageDigest.getInstance("SHA-512");
+            */
             sha = MessageDigest.getInstance("SHA-1");
         } catch (NoSuchAlgorithmException e) {
             throw new RuntimeException(e);