diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
index 2df3c548eb..256ae4e29b 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
@@ -1346,7 +1346,7 @@ boolean areCacheReportsDisabledForTests() {
   /**
    * This method starts the data node with the specified conf.
    * 
-   * If conf's CONFIG_PROPERTY_SIMULATED property is set
+   * If conf's DFS_DATANODE_FSDATASET_FACTORY_KEY property is set
    * then a simulated storage based data node is created.
    * 
    * @param dataDirectories - only for a non-simulated storage data node