diff --git a/hadoop-mapreduce-project/CHANGES.txt b/hadoop-mapreduce-project/CHANGES.txt
index 4d54c8216ef..81a7e144c97 100644
--- a/hadoop-mapreduce-project/CHANGES.txt
+++ b/hadoop-mapreduce-project/CHANGES.txt
@@ -97,6 +97,10 @@ Release 2.1.2 - UNRELEASED
     MAPREDUCE-5513. ConcurrentModificationException in JobControl (Robert
     Parker via jlowe)
 
+    MAPREDUCE-5531. Fix compat with hadoop-1 in mapreduce.(TaskID,
+    TaskAttemptID) by re-introducing missing constructors. (Robert Kanter via
+    acmurthy)
+
 Release 2.1.1-beta - 2013-09-23
 
   INCOMPATIBLE CHANGES
diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/TaskAttemptID.java b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/TaskAttemptID.java
index f2467f02a3b..45fd425fba2 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/TaskAttemptID.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/TaskAttemptID.java
@@ -76,6 +76,20 @@ public class TaskAttemptID extends org.apache.hadoop.mapred.ID {
                        int taskId, int id) {
     this(new TaskID(jtIdentifier, jobId, type, taskId), id);
   }
+
+  /**
+   * Constructs a TaskId object from given parts.
+   * @param jtIdentifier jobTracker identifier
+   * @param jobId job number
+   * @param isMap whether the tip is a map
+   * @param taskId taskId number
+   * @param id the task attempt number
+   */
+  @Deprecated
+  public TaskAttemptID(String jtIdentifier, int jobId, boolean isMap,
+                       int taskId, int id) {
+    this(new TaskID(jtIdentifier, jobId, isMap, taskId), id);
+  }
   
   public TaskAttemptID() { 
     taskId = new TaskID();
diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/TaskID.java b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/TaskID.java
index 3dc2babcbe6..488ffcc62e4 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/TaskID.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/TaskID.java
@@ -91,6 +91,29 @@ public class TaskID extends org.apache.hadoop.mapred.ID {
   public TaskID(String jtIdentifier, int jobId, TaskType type, int id) {
     this(new JobID(jtIdentifier, jobId), type, id);
   }
+
+  /**
+   * Constructs a TaskID object from given {@link JobID}.
+   * @param jobId JobID that this tip belongs to
+   * @param isMap whether the tip is a map
+   * @param id the tip number
+   */
+  @Deprecated
+  public TaskID(JobID jobId, boolean isMap, int id) {
+    this(jobId, isMap ? TaskType.MAP : TaskType.REDUCE, id);
+  }
+
+  /**
+   * Constructs a TaskInProgressId object from given parts.
+   * @param jtIdentifier jobTracker identifier
+   * @param jobId job number
+   * @param isMap whether the tip is a map
+   * @param id the tip number
+   */
+  @Deprecated
+  public TaskID(String jtIdentifier, int jobId, boolean isMap, int id) {
+    this(new JobID(jtIdentifier, jobId), isMap, id);
+  }
   
   public TaskID() { 
     jobId = new JobID();