diff --git a/CHANGES.txt b/CHANGES.txt
index afbe7ff..87e82ab 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -513,6 +513,8 @@
     HDFS-2030. Improve usability of namenode -upgrade command.
     (Bharath Mundlapudi via suresh)
 
+    HDFS-2056. Update fetchdt usage. (Tanping Wang via jitendra)
+
   BUG FIXES
 
     HDFS-1449. Fix test failures - ExtendedBlock must return 
diff --git a/src/java/org/apache/hadoop/hdfs/tools/DelegationTokenFetcher.java b/src/java/org/apache/hadoop/hdfs/tools/DelegationTokenFetcher.java
index 6129afc..d085534 100644
--- a/src/java/org/apache/hadoop/hdfs/tools/DelegationTokenFetcher.java
+++ b/src/java/org/apache/hadoop/hdfs/tools/DelegationTokenFetcher.java
@@ -80,7 +80,8 @@
     err.println("  --webservice <url>  Url to contact NN on");
     err.println("  --renewer <name>    Name of the delegation token renewer");
     err.println("  --cancel            Cancel the delegation token");
-    err.println("  --renew             Renew the delegation token");
+    err.println("  --renew             Renew the delegation token.  Delegation " 
+    		+ "token must have been fetched using the --renewer <name> option.");
     err.println("  --print             Print the delegation token");
     err.println();
     GenericOptionsParser.printGenericCommandUsage(err);