diff --git a/lib/db/mysql.php b/lib/db/mysql.php
index 1d889a473db..c6244b4bc4f 100644
--- a/lib/db/mysql.php
+++ b/lib/db/mysql.php
@@ -736,6 +736,10 @@ function main_upgrade($oldversion=0) {
         table_column("course", "lang", "lang", "varchar", "10", "", "");
     }
 
+    if ($oldversion < 2004042701) {     /// Add hiddentopics field to control hidden topics behaviour
+        table_column("course", "", "hiddentopics", "integer", "1", "unsigned", "0", "not null", "visible");
+    }
+
     return $result;
 
 }
diff --git a/lib/db/mysql.sql b/lib/db/mysql.sql
index 033d129e85d..e0f3514953d 100644
--- a/lib/db/mysql.sql
+++ b/lib/db/mysql.sql
@@ -51,7 +51,8 @@ CREATE TABLE `prefix_course` (
   `marker` int(10) unsigned NOT NULL default '0',
   `maxbytes` int(10) unsigned NOT NULL default '0',
   `showreports` int(4) unsigned NOT NULL default '0',
-  `visible` int(10) unsigned NOT NULL default '1',
+  `visible` int(1) unsigned NOT NULL default '1',
+  `hiddentopics` int(1) unsigned NOT NULL default '0',
   `groupmode` int(4) unsigned NOT NULL default '0',
   `groupmodeforce` int(4) unsigned NOT NULL default '0',
   `lang` varchar(10) NOT NULL default '',
diff --git a/lib/db/postgres7.php b/lib/db/postgres7.php
index 592ae8ee666..b1b963fb9b7 100644
--- a/lib/db/postgres7.php
+++ b/lib/db/postgres7.php
@@ -481,6 +481,10 @@ function main_upgrade($oldversion=0) {
         table_column("course", "lang", "lang", "varchar", "10", "", "");
     }
 
+    if ($oldversion < 2004042701) {     /// Add hiddentopics field to control hidden topics behaviour
+        table_column("course", "", "hiddentopics", "integer", "1", "unsigned", "0", "not null", "visible");
+    }
+
     return $result;
 
 }
diff --git a/lib/db/postgres7.sql b/lib/db/postgres7.sql
index 95b544e0bf1..c5a2bea968a 100644
--- a/lib/db/postgres7.sql
+++ b/lib/db/postgres7.sql
@@ -30,6 +30,7 @@ CREATE TABLE prefix_course (
    maxbytes integer NOT NULL default '0',
    showreports integer NOT NULL default '0',
    visible integer NOT NULL default '1',
+   hiddentopics integer NOT NULL default '0',
    groupmode integer NOT NULL default '0',
    groupmodeforce integer NOT NULL default '0',
    lang varchar(10) NOT NULL default '',