diff --git a/CHANGES.txt b/CHANGES.txt
index b17e9e651a..78d21840bd 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -68,6 +68,9 @@ Trunk (unreleased changes)
 
     HADOOP-7129. Fix typo in method name getProtocolSigature (todd)
 
+    HADOOP-7048.  Wrong description of Block-Compressed SequenceFile Format in
+    SequenceFile's javadoc.  (Jingguo Yao via tomwhite)
+
 Release 0.22.0 - Unreleased
 
   INCOMPATIBLE CHANGES
diff --git a/src/java/org/apache/hadoop/io/SequenceFile.java b/src/java/org/apache/hadoop/io/SequenceFile.java
index 4d5963ab9b..0da6630b20 100644
--- a/src/java/org/apache/hadoop/io/SequenceFile.java
+++ b/src/java/org/apache/hadoop/io/SequenceFile.java
@@ -165,6 +165,7 @@ import org.apache.hadoop.util.PriorityQueue;
  * <li>
  * Record <i>Block</i>
  *   <ul>
+ *     <li>Uncompressed number of records in the block</li>
  *     <li>Compressed key-lengths block-size</li>
  *     <li>Compressed key-lengths block</li>
  *     <li>Compressed keys block-size</li>
@@ -176,7 +177,7 @@ import org.apache.hadoop.util.PriorityQueue;
  *   </ul>
  * </li>
  * <li>
- * A sync-marker every few <code>100</code> bytes or so.
+ * A sync-marker every block.
  * </li>
  * </ul>
  *