diff --git a/filter/mediaplugin/db/install.php b/filter/mediaplugin/db/install.php
index 1200eb6bfd8..64e3fb9ffde 100644
--- a/filter/mediaplugin/db/install.php
+++ b/filter/mediaplugin/db/install.php
@@ -25,6 +25,8 @@
 
 function xmldb_filter_mediaplugin_install() {
     global $CFG;
+    require_once("$CFG->libdir/filterlib.php");
 
+    filter_set_global_state('filter/mediaplugin', TEXTFILTER_ON);
 }