diff --git a/ChangeLog b/ChangeLog
index d11c7a0a2..a8dfd905f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2011-02-11  Wolfgang Sourdeau  <wsourdeau@inverse.ca>
 
+	* OpenChange/MAPIStoreTasksMessageTable.m
+	(-sortIdentifierForProperty:): implemented basic table for
+	supporting common header sorts from the OL interface.
+
 	* OpenChange/MAPIStoreCalendarMessageTable.m
 	(-sortIdentifierForProperty:): implemented basic table.
 
diff --git a/OpenChange/MAPIStoreTasksMessageTable.m b/OpenChange/MAPIStoreTasksMessageTable.m
index baa855f2b..1abaa7d72 100644
--- a/OpenChange/MAPIStoreTasksMessageTable.m
+++ b/OpenChange/MAPIStoreTasksMessageTable.m
@@ -359,4 +359,24 @@
   return rc;
 }
 
+/* sorting */
+
+- (NSString *) sortIdentifierForProperty: (enum MAPITAGS) property
+{
+  static NSMutableDictionary *knownProperties = nil;
+
+  if (!knownProperties)
+    {
+      knownProperties = [NSMutableDictionary new];
+      [knownProperties setObject: @"c_title"
+                          forKey: MAPIPropertyKey (PR_NORMALIZED_SUBJECT_UNICODE)];
+      [knownProperties setObject: @"c_enddate"
+                          forKey: MAPIPropertyKey (PidLidTaskDueDate)];
+      [knownProperties setObject: @"c_creationdate"
+                          forKey: MAPIPropertyKey (PidLidTaskOrdinal)];
+    }
+
+  return [knownProperties objectForKey: MAPIPropertyKey (property)];
+}
+
 @end