diff --git a/web/app/controllers/contest_inside.php b/web/app/controllers/contest_inside.php
index ee33aa0..6b7f418 100644
--- a/web/app/controllers/contest_inside.php
+++ b/web/app/controllers/contest_inside.php
@@ -427,6 +427,7 @@ function echoMySubmissions() {
 	$options[] = ['value' => 'all', 'text' => '所有题目'];
 	for ($i = 0; $i < count($problems); $i++) {
 		$problem = UOJContestProblem::query($problems[$i]);
+		$problem->problem_number = $i;
 		$options[] = [
 			'value' => $problem->getLetter(),
 			'text' => $problem->getTitle(['with' => 'letter', 'simplify' => true]),