diff --git a/src/activitypub/notes.js b/src/activitypub/notes.js
index 52c22c34e8..74a3db197f 100644
--- a/src/activitypub/notes.js
+++ b/src/activitypub/notes.js
@@ -564,7 +564,7 @@ Notes.prune = async () => {
 	 */
 	winston.info('[notes/prune] Starting scheduled pruning of topics');
 	const start = '-inf';
-	const stop = Date.now() - (1000 * 60 * 60 * 24 * 30); // 30 days; todo: make configurable?
+	const stop = Date.now() - (1000 * 60 * 60 * 24 * meta.config.activitypubContentPruneDays);
 	let tids = await db.getSortedSetRangeByScore('cid:-1:tids', 0, -1, start, stop);
 
 	winston.info(`[notes/prune] Found ${tids.length} topics older than 30 days (since last activity).`);