diff --git a/app/javascript/mastodon/reducers/timelines.js b/app/javascript/mastodon/reducers/timelines.js
index 7b7b5470fc0aa5713db1fa0c7838c8305ba4b565..9a10bcc59383740864fcf71274b8b735bef17d0c 100644
--- a/app/javascript/mastodon/reducers/timelines.js
+++ b/app/javascript/mastodon/reducers/timelines.js
@@ -40,7 +40,7 @@ const normalizeTimeline = (state, timeline, statuses, next, isPartial) => {
     mMap.set('loaded', true);
     mMap.set('isLoading', false);
     if (!hadNext) mMap.set('next', next);
-    mMap.set('items', wasLoaded ? ids.concat(oldIds) : ids);
+    mMap.set('items', wasLoaded ? ids.concat(oldIds) : oldIds.concat(ids));
     mMap.set('isPartial', isPartial);
   }));
 };