diff --git a/src/components/structures/TimelinePanel.js b/src/components/structures/TimelinePanel.js
index af1a331287..ab10ec4aca 100644
--- a/src/components/structures/TimelinePanel.js
+++ b/src/components/structures/TimelinePanel.js
@@ -37,7 +37,7 @@ import Timer from '../../utils/Timer';
 
 const PAGINATE_SIZE = 20;
 const INITIAL_SIZE = 20;
-const READ_MARKER_INVIEW_THRESHOLD_MS = 10 * 1000;
+const READ_MARKER_INVIEW_THRESHOLD_MS = 1 * 1000;
 const READ_MARKER_OUTOFVIEW_THRESHOLD_MS = 30 * 1000;
 const READ_RECEIPT_INTERVAL_MS = 500;