diff --git a/lib/db/mysql.php b/lib/db/mysql.php
index e730ad83237..34c2da91ca8 100644
--- a/lib/db/mysql.php
+++ b/lib/db/mysql.php
@@ -1366,6 +1366,10 @@ function main_upgrade($oldversion=0) {
         $result = table_column('event', '', 'repeatid', 'int', '10', 'unsigned', '0', 'not null', 'userid') && $result;
     }
 
+    if ($oldversion < 2005042400) {  // Add user tracking prefs field.
+        table_column('user', '', 'trackforums', 'int', '4', 'unsigned', '1', 'not null', 'autosubscribe');
+    }
+
     return $result;
 }
 
diff --git a/lib/db/postgres7.php b/lib/db/postgres7.php
index 9a1c6557ff5..a4d9d46298e 100644
--- a/lib/db/postgres7.php
+++ b/lib/db/postgres7.php
@@ -1082,6 +1082,10 @@ function main_upgrade($oldversion=0) {
         $result = table_column('event', '', 'repeatid', 'int', '10', 'unsigned', '0', 'not null', 'userid') && $result;
     }
 
+    if ($oldversion < 2005042400) {  // Add user tracking prefs field.
+        table_column('user', '', 'trackforums', 'int', '4', 'unsigned', '1', 'not null', 'autosubscribe');
+    }
+
     return $result;
 }
 
diff --git a/mod/forum/db/mysql.php b/mod/forum/db/mysql.php
index d77d97f6767..35dd8f0cd8d 100644
--- a/mod/forum/db/mysql.php
+++ b/mod/forum/db/mysql.php
@@ -201,10 +201,6 @@ function forum_upgrade($oldversion) {
                   ) COMMENT=\'Tracks each users untracked forums.\';');
   }
 
-  if ($oldversion < 2005042301) { // Add user tracking prefs field.
-      modify_database('','ALTER TABLE prefix_user ADD
-                         `trackforums` TINYINT( 1 ) UNSIGNED DEFAULT \'1\' NOT NULL AFTER `autosubscribe` ;');
-  }
 
   return true;
   
diff --git a/mod/forum/db/postgres7.php b/mod/forum/db/postgres7.php
index c772fe84847..c685d91208c 100644
--- a/mod/forum/db/postgres7.php
+++ b/mod/forum/db/postgres7.php
@@ -141,10 +141,6 @@ function forum_upgrade($oldversion) {
                         );');
   }
 
-  if ($oldversion < 2005042301) { // Add user tracking prefs field.
-      modify_database('','ALTER TABLE prefix_user ADD
-                         trackforums integer default 0 NOT NULL;');
-  }
 
   return true;
 
diff --git a/version.php b/version.php
index a799330045e..d0875791a49 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 = 2005042300;  // YYYYMMDD = date 
+   $version = 2005042400;  // YYYYMMDD = date 
                            //       XY = increments within a single day
 
    $release = '1.5 ALPHA';    // Human-friendly version name