diff --git a/filter/activitynames/db/install.php b/filter/activitynames/db/install.php
new file mode 100644
index 0000000000000..8caef868d55c5
--- /dev/null
+++ b/filter/activitynames/db/install.php
@@ -0,0 +1,31 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Filter post install hook
+ *
+ * @package    filter_activitynames
+ * @copyright  2012 Petr Skoda {@link http://skodak.org}
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+function xmldb_filter_activitynames_install() {
+    global $CFG;
+    require_once("$CFG->libdir/filterlib.php");
+
+    filter_set_global_state('filter/activitynames', TEXTFILTER_ON);
+}
+