diff --git a/backend/src/routes/zone_checkins.ts b/backend/src/routes/zone_checkins.ts
index acd0398..8d348f1 100644
--- a/backend/src/routes/zone_checkins.ts
+++ b/backend/src/routes/zone_checkins.ts
@@ -33,7 +33,7 @@ const canCheckIn = permissions.checkPermissions(FEATURE_PERMISSIONS.ZONE_CHECKIN
  *   post:
  *     tags: [Zone Check-in]
  *     summary: Record today's zone (upsert)
- *     description: Requires ZONE_CHECKIN. Body `{ data: { zone } }` (blue|green|yellow|red).
+ *     description: "Requires ZONE_CHECKIN. Body { data: { zone } } (blue|green|yellow|red)."
  *     responses:
  *       200: { description: '{ date, zone, isCheckedInToday }' }
  *       400: { $ref: '#/components/responses/ValidationError' }