diff --git a/mod/lti/edit_form.php b/mod/lti/edit_form.php
index 27813b58a23..907ce56e5b8 100644
--- a/mod/lti/edit_form.php
+++ b/mod/lti/edit_form.php
@@ -52,7 +52,7 @@ defined('MOODLE_INTERNAL') || die;
 require_once($CFG->libdir.'/formslib.php');
 require_once($CFG->dirroot.'/mod/lti/locallib.php');
 
-public class mod_lti_edit_types_form extends moodleform{
+class mod_lti_edit_types_form extends moodleform{
     public function definition() {
         $mform    =& $this->_form;
 
diff --git a/mod/lti/localadminlib.php b/mod/lti/localadminlib.php
index a79a39f5b5f..128c345b856 100644
--- a/mod/lti/localadminlib.php
+++ b/mod/lti/localadminlib.php
@@ -55,7 +55,7 @@ require_once($CFG->libdir.'/adminlib.php');
  *
  * @TODO: finish doc this class and it's functions
  */
-public class admin_setting_ltimodule_configlink extends admin_setting {
+class admin_setting_ltimodule_configlink extends admin_setting {
 
     /**
      * Constructor
diff --git a/mod/lti/mod_form.php b/mod/lti/mod_form.php
index 20dd5ce626b..c588e39b5af 100644
--- a/mod/lti/mod_form.php
+++ b/mod/lti/mod_form.php
@@ -51,7 +51,7 @@ defined('MOODLE_INTERNAL') || die;
 require_once($CFG->dirroot.'/course/moodleform_mod.php');
 require_once($CFG->dirroot.'/mod/lti/locallib.php');
 
-public class mod_lti_mod_form extends moodleform_mod {
+class mod_lti_mod_form extends moodleform_mod {
 
     public function definition() {
         global $DB, $PAGE, $OUTPUT, $USER, $COURSE;
@@ -237,7 +237,7 @@ public class mod_lti_mod_form extends moodleform_mod {
      *
      * @param array $default_values passed by reference
      */
-    protected function data_preprocessing(&$default_values) {
+    public function data_preprocessing(&$default_values) {
 
     }
 }