diff --git a/mod/data/lib.php b/mod/data/lib.php
index d4da9cb46a2..745f3730a4b 100644
--- a/mod/data/lib.php
+++ b/mod/data/lib.php
@@ -21,6 +21,8 @@
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined('MOODLE_INTERNAL') || die();
+
 // Some constants
 define ('DATA_MAX_ENTRIES', 50);
 define ('DATA_PERPAGE_SINGLE', 1);
diff --git a/mod/data/locallib.php b/mod/data/locallib.php
index 9d829635f08..5725e237aeb 100644
--- a/mod/data/locallib.php
+++ b/mod/data/locallib.php
@@ -21,6 +21,8 @@
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined('MOODLE_INTERNAL') || die();
+
 require_once($CFG->dirroot . '/mod/data/lib.php');
 require_once($CFG->libdir . '/portfolio/caller.php');
 require_once($CFG->libdir . '/filelib.php');
diff --git a/mod/data/rsslib.php b/mod/data/rsslib.php
index 823239fa9f6..1390fb21e3d 100644
--- a/mod/data/rsslib.php
+++ b/mod/data/rsslib.php
@@ -25,6 +25,8 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined('MOODLE_INTERNAL') || die();
+
 /**
  * Generates the Database modules RSS Feed
  *