Index: modules/activiti-engine/src/main/java/org/activiti/engine/impl/HistoricTaskInstanceQueryImpl.java
===================================================================
--- modules/activiti-engine/src/main/java/org/activiti/engine/impl/HistoricTaskInstanceQueryImpl.java   (revision 2993)
+++ modules/activiti-engine/src/main/java/org/activiti/engine/impl/HistoricTaskInstanceQueryImpl.java   (working copy)
@@ -293,6 +293,11 @@
     return this;
   }
 
+  public HistoricTaskInstanceQuery orderByTaskDueDate() {
+    orderBy(HistoricTaskInstanceQueryProperty.TASK_DUE_DATE);
+    return this;
+  }
+  
   public HistoricTaskInstanceQueryImpl orderByDeleteReason() {
     orderBy(HistoricTaskInstanceQueryProperty.DELETE_REASON);
     return this;
Index: modules/activiti-engine/src/main/java/org/activiti/engine/impl/HistoricTaskInstanceQueryProperty.java
===================================================================
--- modules/activiti-engine/src/main/java/org/activiti/engine/impl/HistoricTaskInstanceQueryProperty.java       (revision 2993)
+++ modules/activiti-engine/src/main/java/org/activiti/engine/impl/HistoricTaskInstanceQueryProperty.java       (working copy)
@@ -42,6 +42,7 @@
   public static final HistoricTaskInstanceQueryProperty END = new HistoricTaskInstanceQueryProperty("END_TIME_");
   public static final HistoricTaskInstanceQueryProperty DURATION = new HistoricTaskInstanceQueryProperty("DURATION_");
   public static final HistoricTaskInstanceQueryProperty TASK_PRIORITY = new HistoricTaskInstanceQueryProperty("PRIORITY_");
+  public static final HistoricTaskInstanceQueryProperty TASK_DUE_DATE = new HistoricTaskInstanceQueryProperty("DUE_DATE_");
 
   private String name;
 
Index: modules/activiti-engine/src/main/java/org/activiti/engine/history/HistoricTaskInstanceQuery.java
===================================================================
--- modules/activiti-engine/src/main/java/org/activiti/engine/history/HistoricTaskInstanceQuery.java    (revision 2993)
+++ modules/activiti-engine/src/main/java/org/activiti/engine/history/HistoricTaskInstanceQuery.java    (working copy)
@@ -214,6 +214,9 @@
   /** Order by task owner (needs to be followed by {@link #asc()} or {@link #desc()}). */
   HistoricTaskInstanceQuery orderByTaskOwner();
   
+  /** Order by task due date (needs to be followed by {@link #asc()} or {@link #desc()}). */
+  HistoricTaskInstanceQuery orderByTaskDueDate();
+  
   /** Order by task delete reason (needs to be followed by {@link #asc()} or {@link #desc()}). */
   HistoricTaskInstanceQuery orderByDeleteReason();