diff --git a/dba/davical.sql b/dba/davical.sql
index 57dd2783..b1a40471 100644
--- a/dba/davical.sql
+++ b/dba/davical.sql
@@ -71,6 +71,7 @@ CREATE TABLE calendar_item (
   percent_complete NUMERIC(7,2),
   tz_id TEXT REFERENCES time_zone( tz_id ),
   status TEXT,
+  completed TIMESTAMP WITH TIME ZONE,
   dav_id INT8 UNIQUE,
   collection_id INT8 REFERENCES collection(collection_id) ON UPDATE CASCADE ON DELETE CASCADE DEFERRABLE,
 
diff --git a/dba/patches/1.2.4.sql b/dba/patches/1.2.4.sql
new file mode 100644
index 00000000..868d2814
--- /dev/null
+++ b/dba/patches/1.2.4.sql
@@ -0,0 +1,16 @@
+
+-- This database update provides new tables for the Principal, for
+-- a consistent dav_resource which a principal, collection or calendar_item
+-- all inherit from.
+
+BEGIN;
+SELECT check_db_revision(1,2,3);
+
+-- Add a column to hold the 'COMPLETED' property from the caldav_data
+ALTER TABLE calendar_item ADD COLUMN completed TIMESTAMP WITH TIME ZONE;
+
+SELECT new_db_revision(1,2,4, 'Avril' );
+
+COMMIT;
+ROLLBACK;
+