diff --git a/public/main/my_space/myStudents.php b/public/main/my_space/myStudents.php
index f3b0139acf..913cb733ce 100644
--- a/public/main/my_space/myStudents.php
+++ b/public/main/my_space/myStudents.php
@@ -27,7 +27,7 @@ $export = $_GET['export'] ?? false;
 $sessionId = isset($_GET['sid']) ? (int) $_GET['sid'] : 0;
 $action = $_GET['action'] ?? '';
 $origin = api_get_origin();
-$courseId = isset($_GET['cid']) ? (int) $_GET['cid'] : '';
+$courseId = isset($_GET['cid']) ? (int) $_GET['cid'] : 0;
 $course = api_get_course_entity($courseId);
 $courseCode = '';
 if (null !== $course) {