diff --git a/mod/assign/classes/privacy/provider.php b/mod/assign/classes/privacy/provider.php
index bbe0713eead..c706711901b 100644
--- a/mod/assign/classes/privacy/provider.php
+++ b/mod/assign/classes/privacy/provider.php
@@ -376,7 +376,7 @@ class provider implements metadataprovider, pluginprovider, preference_provider
             'timemodified' => transform::datetime($grade->timemodified),
             'grader' => transform::user($grade->grader),
             'grade' => $grade->grade,
-            'attemptnumber' => $grade->attemptnumber
+            'attemptnumber' => ($grade->attemptnumber + 1)
         ];
         writer::with_context($context)
                 ->export_data(array_merge($currentpath, [get_string('privacy:gradepath', 'mod_assign')]), $gradedata);
@@ -395,7 +395,7 @@ class provider implements metadataprovider, pluginprovider, preference_provider
             'timemodified' => transform::datetime($submission->timemodified),
             'status' => get_string('submissionstatus_' . $submission->status, 'mod_assign'),
             'groupid' => $submission->groupid,
-            'attemptnumber' => $submission->attemptnumber,
+            'attemptnumber' => ($submission->attemptnumber + 1),
             'latest' => transform::yesno($submission->latest)
         ];
         writer::with_context($context)
diff --git a/mod/assign/tests/privacy_test.php b/mod/assign/tests/privacy_test.php
index a9800bc0ba1..ac2ee025561 100644
--- a/mod/assign/tests/privacy_test.php
+++ b/mod/assign/tests/privacy_test.php
@@ -214,8 +214,8 @@ class mod_assign_privacy_testcase extends provider_testcase {
         // Check Submissions.
         $this->assertEquals($submissiontext, $writer->get_data(['attempt 1', 'Submission Text'])->text);
         $this->assertEquals($submissiontext2, $writer->get_data(['attempt 2', 'Submission Text'])->text);
-        $this->assertEquals(0, $writer->get_data(['attempt 1', 'submission'])->attemptnumber);
-        $this->assertEquals(1, $writer->get_data(['attempt 2', 'submission'])->attemptnumber);
+        $this->assertEquals(1, $writer->get_data(['attempt 1', 'submission'])->attemptnumber);
+        $this->assertEquals(2, $writer->get_data(['attempt 2', 'submission'])->attemptnumber);
         // Check grades.
         $this->assertEquals($grade1, $writer->get_data(['attempt 1', 'grade'])->grade);
         $this->assertEquals($grade2, $writer->get_data(['attempt 2', 'grade'])->grade);