diff --git a/packages/backend/src/core/FanoutTimelineEndpointService.ts b/packages/backend/src/core/FanoutTimelineEndpointService.ts
index 55ef7abf3c..6c874db9d1 100644
--- a/packages/backend/src/core/FanoutTimelineEndpointService.ts
+++ b/packages/backend/src/core/FanoutTimelineEndpointService.ts
@@ -67,12 +67,12 @@ export class FanoutTimelineEndpointService {
 		let shouldFallbackToDb = ps.useDbFallback && (redisResult.length > 1 && redisResult.some(ids => ids.length === 0));
 
 		// 取得したresultの中で最古のIDのうち、最も新しいものを取得
-		const thresholdId = redisResult.map(ids => ids[0]).sort()[0];
+		const fttThresholdId = redisResult.map(ids => ids[0]).sort()[0];
 
 		// TODO: いい感じにgetMulti内でソート済だからuniqするときにredisResultが全てソート済なのを利用して再ソートを避けたい
 		const redisResultIds = shouldFallbackToDb ? [] : Array.from(new Set(redisResult.flat(1))).sort(idCompare);
 
-		let noteIds = redisResultIds.filter(id => id >= thresholdId).slice(0, ps.limit);
+		let noteIds = redisResultIds.filter(id => id >= fttThresholdId).slice(0, ps.limit);
 
 		const oldestNoteId = ascending ? redisResultIds[0] : redisResultIds[redisResultIds.length - 1];
 		shouldFallbackToDb ||= noteIds.length === 0 || ps.sinceId != null && ps.sinceId < oldestNoteId;