diff --git a/app/soapbox/features/chats/components/chat-message-list.tsx b/app/soapbox/features/chats/components/chat-message-list.tsx
index f281a5e13..164a4240e 100644
--- a/app/soapbox/features/chats/components/chat-message-list.tsx
+++ b/app/soapbox/features/chats/components/chat-message-list.tsx
@@ -78,8 +78,8 @@ const ChatMessageList: React.FC<IChatMessageList> = ({ chat }) => {
   const account = useOwnAccount();
   const features = useFeatures();
 
-  const lastReadMessageDateString = chat.latest_read_message_by_account.find((latest) => latest.id === chat.account.id)?.date;
-  const myLastReadMessageDateString = chat.latest_read_message_by_account.find((latest) => latest.id === account?.id)?.date;
+  const lastReadMessageDateString = chat.latest_read_message_by_account?.find((latest) => latest.id === chat.account.id)?.date;
+  const myLastReadMessageDateString = chat.latest_read_message_by_account?.find((latest) => latest.id === account?.id)?.date;
   const lastReadMessageTimestamp = lastReadMessageDateString ? new Date(lastReadMessageDateString) : null;
   const myLastReadMessageTimestamp = myLastReadMessageDateString ? new Date(myLastReadMessageDateString) : null;
 
diff --git a/app/soapbox/queries/chats.ts b/app/soapbox/queries/chats.ts
index a57b32591..3cfeeeda2 100644
--- a/app/soapbox/queries/chats.ts
+++ b/app/soapbox/queries/chats.ts
@@ -42,7 +42,7 @@ export interface IChat {
     id: string
     unread: boolean
   }
-  latest_read_message_by_account: {
+  latest_read_message_by_account?: {
     id: string,
     date: string
   }[]