diff --git a/colourpicker.php b/colourpicker.php
index 40d1c00..a05506f 100644
--- a/colourpicker.php
+++ b/colourpicker.php
@@ -15,7 +15,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle. If not, see <http://www.gnu.org/licenses/>.
 
-defined('MOODLE_INTERNAL') || die();
+defined('MOODLE_INTERNAL') || die('Direct access to this script is forbidden.');
 
 require_once("HTML/QuickForm/text.php");
 
diff --git a/edit_form.php b/edit_form.php
index 56e2091..0a0cd22 100644
--- a/edit_form.php
+++ b/edit_form.php
@@ -15,9 +15,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle. If not, see <http://www.gnu.org/licenses/>.
 
-if (!defined('MOODLE_INTERNAL')) {
-    die('Direct access to this script is forbidden.');    ///  It must be included from a Moodle page
-}
+defined('MOODLE_INTERNAL') || die('Direct access to this script is forbidden.');
 
 require_once($CFG->dirroot . '/course/moodleform_mod.php');
 require_once($CFG->dirroot . '/mod/customcert/lib.php');
diff --git a/elements/date/lib.php b/elements/date/lib.php
index 280ca9d..3fd8948 100644
--- a/elements/date/lib.php
+++ b/elements/date/lib.php
@@ -23,7 +23,7 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-defined('MOODLE_INTERNAL') || die();
+defined('MOODLE_INTERNAL') || die('Direct access to this script is forbidden.');
 
 require_once($CFG->dirroot . '/mod/customcert/elements/element.class.php');
 
diff --git a/elements/date/version.php b/elements/date/version.php
index a12ad42..efce348 100644
--- a/elements/date/version.php
+++ b/elements/date/version.php
@@ -23,7 +23,7 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-defined('MOODLE_INTERNAL') || die();
+defined('MOODLE_INTERNAL') || die('Direct access to this script is forbidden.');
 
 $plugin->version   = 2013031300;
 $plugin->requires  = 2012112900;
diff --git a/elements/element.class.php b/elements/element.class.php
index 3ccbd43..8c7a287 100644
--- a/elements/element.class.php
+++ b/elements/element.class.php
@@ -24,7 +24,7 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-defined('MOODLE_INTERNAL') || die();
+defined('MOODLE_INTERNAL') || die('Direct access to this script is forbidden.');
 
 class customcert_element_base {
 
diff --git a/elements/grade/lib.php b/elements/grade/lib.php
index d9eca0c..097b78f 100644
--- a/elements/grade/lib.php
+++ b/elements/grade/lib.php
@@ -23,7 +23,7 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-defined('MOODLE_INTERNAL') || die();
+defined('MOODLE_INTERNAL') || die('Direct access to this script is forbidden.');
 
 require_once($CFG->dirroot . '/mod/customcert/elements/element.class.php');
 require_once($CFG->dirroot . '/grade/lib.php');
diff --git a/elements/grade/version.php b/elements/grade/version.php
index c82252e..c9cb902 100644
--- a/elements/grade/version.php
+++ b/elements/grade/version.php
@@ -23,7 +23,7 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-defined('MOODLE_INTERNAL') || die();
+defined('MOODLE_INTERNAL') || die('Direct access to this script is forbidden.');
 
 $plugin->version   = 2013031300;
 $plugin->requires  = 2012112900;
diff --git a/elements/studentname/lib.php b/elements/studentname/lib.php
index 748ab48..21a107b 100644
--- a/elements/studentname/lib.php
+++ b/elements/studentname/lib.php
@@ -23,7 +23,7 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-defined('MOODLE_INTERNAL') || die();
+defined('MOODLE_INTERNAL') || die('Direct access to this script is forbidden.');
 
 require_once($CFG->dirroot . '/mod/customcert/elements/element.class.php');
 
diff --git a/elements/studentname/version.php b/elements/studentname/version.php
index 9c2cea4..418ef5b 100644
--- a/elements/studentname/version.php
+++ b/elements/studentname/version.php
@@ -23,7 +23,7 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-defined('MOODLE_INTERNAL') || die();
+defined('MOODLE_INTERNAL') || die('Direct access to this script is forbidden.');
 
 $plugin->version   = 2013022901;
 $plugin->requires  = 2012112900;
diff --git a/lib.php b/lib.php
index 80f40f2..772fd38 100644
--- a/lib.php
+++ b/lib.php
@@ -24,6 +24,8 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+defined('MOODLE_INTERNAL') || die('Direct access to this script is forbidden.');
+
 /**
  * Add customcert instance.
  *
diff --git a/mod_form.php b/mod_form.php
index a735c30..b51d8f5 100644
--- a/mod_form.php
+++ b/mod_form.php
@@ -15,9 +15,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle. If not, see <http://www.gnu.org/licenses/>.
 
-if (!defined('MOODLE_INTERNAL')) {
-    die('Direct access to this script is forbidden.');    ///  It must be included from a Moodle page
-}
+defined('MOODLE_INTERNAL') || die('Direct access to this script is forbidden.');
 
 require_once($CFG->dirroot.'/course/moodleform_mod.php');
 require_once($CFG->dirroot.'/mod/customcert/lib.php');
diff --git a/version.php b/version.php
index dbfc508..bda15f6 100644
--- a/version.php
+++ b/version.php
@@ -24,6 +24,8 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or late
  */
 
+defined('MOODLE_INTERNAL') || die('Direct access to this script is forbidden.');
+
 $module->version   = 2013022101; // The current module version (Date: YYYYMMDDXX)
 $module->requires  = 2012062500; // Requires this Moodle version
 $module->cron      = 0; // Period for cron to check this module (secs)