diff --git a/migrations/20240721234722-login_to_string.js b/migrations/20240721234722-login_to_string.js
new file mode 100644
index 00000000..93d4b181
--- /dev/null
+++ b/migrations/20240721234722-login_to_string.js
@@ -0,0 +1,18 @@
+/**
+ * Copyright: The PastVu contributors.
+ * GNU Affero General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/agpl.txt)
+ */
+
+/**
+ * Update numeric login to string. We have some old numeric logins, they fail on profile
+ * viewing.
+ */
+module.exports = {
+    async up(db) {
+        await db.collection('users').updateMany({ login: { $type: 1 } }, [{ $set: { login: { $toString: '$login' } } }]);
+    },
+
+    async down() {
+    // No rollback.
+    },
+};