diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/IncrementalBlockReportManager.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/IncrementalBlockReportManager.java
index 42f3173f6c..3b093a7f59 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/IncrementalBlockReportManager.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/IncrementalBlockReportManager.java
@@ -128,8 +128,8 @@ int putMissing(ReceivedDeletedBlockInfo[] rdbis) {
       = Maps.newHashMap();
 
   /**
-   * If this flag is set then an IBR will be sent immediately by the actor
-   * thread without waiting for the IBR timer to elapse.
+   * If this flag is set then an IBR will be sent by the actor
+   * thread after waiting for the IBR timer to elapse.
    */
   private volatile boolean readyToSend = false;