diff --git a/lib/grade/grade_item.php b/lib/grade/grade_item.php
index 344e3f492a4..116ad28eb08 100644
--- a/lib/grade/grade_item.php
+++ b/lib/grade/grade_item.php
@@ -1721,6 +1721,7 @@ class grade_item extends grade_object {
      * @param string $feedback Optional teacher feedback
      * @param int $feedbackformat A format like FORMAT_PLAIN or FORMAT_HTML
      * @param int $usermodified The ID of the user making the modification
+     * @param int $timemodified Optional parameter to set the time modified, if not present current time.
      * @return bool success
      */
     public function update_final_grade($userid, $finalgrade = false,
@@ -1793,7 +1794,7 @@ class grade_item extends grade_object {
         $gradechanged = false;
         if (empty($grade->id)) {
             $grade->timecreated = null;   // Hack alert - date submitted - no submission yet.
-            $grade->timemodified = $timemodified ?: time(); // Hack alert - date graded.
+            $grade->timemodified = $timemodified ?? time(); // Hack alert - date graded.
             $result = (bool)$grade->insert($source);
 
             // If the grade insert was successful and the final grade was not null then trigger a user_graded event.
@@ -1817,7 +1818,7 @@ class grade_item extends grade_object {
                 return $result;
             }
 
-            $grade->timemodified = $timemodified?:time(); // Hack alert - date graded.
+            $grade->timemodified = $timemodified ?? time(); // Hack alert - date graded.
             $result = $grade->update($source);
 
             // If the grade update was successful and the actual grade has changed then trigger a user_graded event.
diff --git a/lib/upgrade.txt b/lib/upgrade.txt
index 20f3aeba9ca..59c675fb2f3 100644
--- a/lib/upgrade.txt
+++ b/lib/upgrade.txt
@@ -1,6 +1,9 @@
 This files describes API changes in core libraries and APIs,
 information provided here is intended especially for developers.
 
+=== 3.7.5 ===
+* grade_item::update_final_grade() can now take an optional parameter to set the grade->timemodified. If not present the current time will carry on being used.
+
 === 3.7.4 ===
 * behat_data_generators::the_following_exist() has been removed, please use
   behat_data_generators::the_following_entities_exist() instead. See MDL-67691 for more info.
diff --git a/mod/lti/service/gradebookservices/classes/local/service/gradebookservices.php b/mod/lti/service/gradebookservices/classes/local/service/gradebookservices.php
index c7e852bbd14..c73df89a523 100644
--- a/mod/lti/service/gradebookservices/classes/local/service/gradebookservices.php
+++ b/mod/lti/service/gradebookservices/classes/local/service/gradebookservices.php
@@ -394,7 +394,7 @@ class gradebookservices extends service_base {
             $grade->feedbackformat = $feedbackformat;
             $grade->feedback = $feedback;
             $grade->rawgrade = $finalgrade;
-            $status = \grade_update($source, $gradeitem->courseid,
+            $status = grade_update($source, $gradeitem->courseid,
                          $gradeitem->itemtype, $gradeitem->itemmodule,
                          $gradeitem->iteminstance, $gradeitem->itemnumber,
                          $grade);