diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
index 70f53e23cfb..9216bd44fc6 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
+++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
@@ -282,6 +282,9 @@ Release 2.6.0 - UNRELEASED
 
     HDFS-6890. NFS readdirplus doesn't return dotdot attributes (brandonli)
 
+    HDFS-6829. DFSAdmin refreshSuperUserGroupsConfiguration failed in
+    security cluster (zhaoyunjiong via Arpit Agarwal)
+
 Release 2.5.0 - 2014-08-11
 
   INCOMPATIBLE CHANGES
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java
index f4d39a830de..ad7be18a67c 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/DFSAdmin.java
@@ -356,7 +356,7 @@ static int run(DistributedFileSystem dfs, String[] argv, int idx) throws IOExcep
    * Construct a DFSAdmin object.
    */
   public DFSAdmin() {
-    this(null);
+    this(new HdfsConfiguration());
   }
 
   /**