diff --git a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
index 4922e7ec72..f63c83b495 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
+++ b/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
@@ -463,6 +463,8 @@ Release 2.0.5-beta - UNRELEASED
     HDFS-4655. DNA_FINALIZE is logged as being an unknown command by the DN
     when received from the standby NN. (atm)
 
+    HDFS-4656. DN heartbeat loop can be briefly tight. (atm)
+
 Release 2.0.4-alpha - UNRELEASED
 
   INCOMPATIBLE CHANGES
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPServiceActor.java b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPServiceActor.java
index ad4a78e30f..75f42f959d 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPServiceActor.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BPServiceActor.java
@@ -512,7 +512,7 @@ private void offerService() throws Exception {
         //
         // Every so often, send heartbeat or block-report
         //
-        if (startTime - lastHeartbeat > dnConf.heartBeatInterval) {
+        if (startTime - lastHeartbeat >= dnConf.heartBeatInterval) {
           //
           // All heartbeat messages include following info:
           // -- Datanode name