diff --git a/lib/pages/chat/chat_event_list.dart b/lib/pages/chat/chat_event_list.dart
index 95d4f856..04cb70e4 100644
--- a/lib/pages/chat/chat_event_list.dart
+++ b/lib/pages/chat/chat_event_list.dart
@@ -103,6 +103,7 @@ class ChatEventList extends StatelessWidget {
             // The message at this index:
             final event = events[i];
             final animateIn = animateInEventIndex != null &&
+                controller.timeline!.events.length > animateInEventIndex &&
                 event == controller.timeline!.events[animateInEventIndex];
 
             return AutoScrollTag(