diff --git a/backend/src/routes/tickets.ts b/backend/src/routes/tickets.ts
index 43705fe..da5df76 100644
--- a/backend/src/routes/tickets.ts
+++ b/backend/src/routes/tickets.ts
@@ -1476,7 +1476,7 @@ ticketsRouter.post('/admin/guest', requireAuth(['admin', 'organizer', 'staff']),
     attendeePhone: data.phone && data.phone.trim() ? data.phone.trim() : null,
     preferredLanguage: data.preferredLanguage || null,
     status: 'confirmed',
-    isGuest: true,
+    isGuest: 1,
     qrCode,
     checkinAt: null,
     adminNote: data.adminNote || null,