diff --git a/lib/db/mysql.php b/lib/db/mysql.php
index fdf1ad1e43e..ad48660d74a 100644
--- a/lib/db/mysql.php
+++ b/lib/db/mysql.php
@@ -1473,6 +1473,11 @@ function main_upgrade($oldversion=0) {
         }
     }
 
+    if ($oldversion < 2005072000) {  // Add a couple fields to mdl_event to work towards iCal import/export
+        table_column('event', '', 'uuid', 'char', '36', '', '', 'not null', 'visible');
+        table_column('event', '', 'sequence', 'integer', '10', 'unsigned', '1', 'not null', 'uuid');
+    }
+
     return $result;
 }
 
diff --git a/lib/db/mysql.sql b/lib/db/mysql.sql
index 0f482d1d5e6..0435b37f587 100644
--- a/lib/db/mysql.sql
+++ b/lib/db/mysql.sql
@@ -192,6 +192,8 @@ CREATE TABLE `prefix_event` (
   `timestart` int(10) unsigned NOT NULL default '0',
   `timeduration` int(10) unsigned NOT NULL default '0',
   `visible` tinyint(4) NOT NULL default '1',
+  `uuid` char(36) NOT NULL default '',
+  `sequence` int(10) unsigned NOT NULL default '1',
   `timemodified` int(10) unsigned NOT NULL default '0',
   PRIMARY KEY  (`id`),
   UNIQUE KEY `id` (`id`),
diff --git a/lib/db/postgres7.php b/lib/db/postgres7.php
index 784f7423d4b..1529fb4c3a8 100644
--- a/lib/db/postgres7.php
+++ b/lib/db/postgres7.php
@@ -1193,6 +1193,11 @@ function main_upgrade($oldversion=0) {
         }
     }
 
+    if ($oldversion < 2005072000) {  // Add a couple fields to mdl_event to work towards iCal import/export
+        table_column('event', '', 'uuid', 'char', '36', '', '', 'not null', 'visible');
+        table_column('event', '', 'sequence', 'integer', '10', 'unsigned', '1', 'not null', 'uuid');
+    }
+
     return $result;
 }
 
diff --git a/lib/db/postgres7.sql b/lib/db/postgres7.sql
index f59c768bd6b..900dd764251 100644
--- a/lib/db/postgres7.sql
+++ b/lib/db/postgres7.sql
@@ -126,6 +126,8 @@ CREATE TABLE prefix_event (
    timestart integer NOT NULL default '0',
    timeduration integer NOT NULL default '0',
    visible integer NOT NULL default '1',
+   uuid char(36) NOT NULL default '',
+   sequence integer NOT NULL default '1',
    timemodified integer NOT NULL default '0'
 );
 
diff --git a/version.php b/version.php
index d324dbffbe1..3f8bcde61d9 100644
--- a/version.php
+++ b/version.php
@@ -6,7 +6,7 @@
 // This is compared against the values stored in the database to determine
 // whether upgrades should be performed (see lib/db/*.php)
 
-   $version = 2005071700;  // YYYYMMDD = date
+   $version = 2005072000;  // YYYYMMDD = date
                            //       XY = increments within a single day
 
    $release = '1.6 development';    // Human-friendly version name