diff --git a/src/topics/unread.js b/src/topics/unread.js
index f07640875f..c816bd62e0 100644
--- a/src/topics/unread.js
+++ b/src/topics/unread.js
@@ -370,6 +370,6 @@ module.exports = function (Topics) {
 
 	Topics.filterUnrepliedTids = async function (tids) {
 		const scores = await db.sortedSetScores('topics:posts', tids);
-		return tids.filter((tid, index) => tid && scores[index] <= 1);
+		return tids.filter((tid, index) => tid && scores[index] !== null && scores[index] <= 1);
 	};
 };