diff --git a/src/Unread.ts b/src/Unread.ts
index 91e192b371..3dfd63614c 100644
--- a/src/Unread.ts
+++ b/src/Unread.ts
@@ -21,6 +21,8 @@ import { EventType } from "matrix-js-sdk/src/@types/event";
 import { MatrixClientPeg } from "./MatrixClientPeg";
 import shouldHideEvent from './shouldHideEvent';
 import { haveTileForEvent } from "./components/views/rooms/EventTile";
+import SettingsStore from "./settings/SettingsStore";
+import { RoomNotificationStateStore } from "./stores/notifications/RoomNotificationStateStore";
 
 /**
  * Returns true if this event arriving in a room should affect the room's
@@ -57,14 +59,21 @@ export function doesRoomHaveUnreadMessages(room: Room): boolean {
     // despite the name of the method :((
     const readUpToId = room.getEventReadUpTo(myUserId);
 
-    // as we don't send RRs for our own messages, make sure we special case that
-    // if *we* sent the last message into the room, we consider it not unread!
-    // Should fix: https://github.com/vector-im/element-web/issues/3263
-    //             https://github.com/vector-im/element-web/issues/2427
-    // ...and possibly some of the others at
-    //             https://github.com/vector-im/element-web/issues/3363
-    if (room.timeline.length && room.timeline[room.timeline.length - 1].getSender() === myUserId) {
-        return false;
+    if (!SettingsStore.getValue("feature_thread")) {
+        // as we don't send RRs for our own messages, make sure we special case that
+        // if *we* sent the last message into the room, we consider it not unread!
+        // Should fix: https://github.com/vector-im/element-web/issues/3263
+        //             https://github.com/vector-im/element-web/issues/2427
+        // ...and possibly some of the others at
+        //             https://github.com/vector-im/element-web/issues/3363
+        if (room.timeline.length && room.timeline[room.timeline.length - 1].getSender() === myUserId) {
+            return false;
+        }
+    } else {
+        const threadState = RoomNotificationStateStore.instance.getThreadsRoomState(room);
+        if (threadState.color > 0) {
+            return true;
+        }
     }
 
     // if the read receipt relates to an event is that part of a thread
diff --git a/src/stores/notifications/RoomNotificationState.ts b/src/stores/notifications/RoomNotificationState.ts
index 517a23fa97..c4c803483d 100644
--- a/src/stores/notifications/RoomNotificationState.ts
+++ b/src/stores/notifications/RoomNotificationState.ts
@@ -25,17 +25,21 @@ import { EffectiveMembership, getEffectiveMembership } from "../../utils/members
 import { readReceiptChangeIsFor } from "../../utils/read-receipts";
 import * as RoomNotifs from '../../RoomNotifs';
 import * as Unread from '../../Unread';
-import { NotificationState } from "./NotificationState";
+import { NotificationState, NotificationStateEvents } from "./NotificationState";
 import { getUnsentMessages } from "../../components/structures/RoomStatusBar";
+import { ThreadsRoomNotificationState } from "./ThreadsRoomNotificationState";
 
 export class RoomNotificationState extends NotificationState implements IDestroyable {
-    constructor(public readonly room: Room) {
+    constructor(public readonly room: Room, private readonly threadsState?: ThreadsRoomNotificationState) {
         super();
         this.room.on(RoomEvent.Receipt, this.handleReadReceipt);
         this.room.on(RoomEvent.Timeline, this.handleRoomEventUpdate);
         this.room.on(RoomEvent.Redaction, this.handleRoomEventUpdate);
         this.room.on(RoomEvent.MyMembership, this.handleMembershipUpdate);
         this.room.on(RoomEvent.LocalEchoUpdated, this.handleLocalEchoUpdated);
+        if (threadsState) {
+            threadsState.on(NotificationStateEvents.Update, this.handleThreadsUpdate);
+        }
         MatrixClientPeg.get().on(MatrixEventEvent.Decrypted, this.onEventDecrypted);
         MatrixClientPeg.get().on(ClientEvent.AccountData, this.handleAccountDataUpdate);
         this.updateNotificationState();
@@ -52,12 +56,19 @@ export class RoomNotificationState extends NotificationState implements IDestroy
         this.room.removeListener(RoomEvent.Redaction, this.handleRoomEventUpdate);
         this.room.removeListener(RoomEvent.MyMembership, this.handleMembershipUpdate);
         this.room.removeListener(RoomEvent.LocalEchoUpdated, this.handleLocalEchoUpdated);
+        if (this.threadsState) {
+            this.threadsState.removeListener(NotificationStateEvents.Update, this.handleThreadsUpdate);
+        }
         if (MatrixClientPeg.get()) {
             MatrixClientPeg.get().removeListener(MatrixEventEvent.Decrypted, this.onEventDecrypted);
             MatrixClientPeg.get().removeListener(ClientEvent.AccountData, this.handleAccountDataUpdate);
         }
     }
 
+    private handleThreadsUpdate = () => {
+        this.updateNotificationState();
+    };
+
     private handleLocalEchoUpdated = () => {
         this.updateNotificationState();
     };
diff --git a/src/stores/notifications/RoomNotificationStateStore.ts b/src/stores/notifications/RoomNotificationStateStore.ts
index 6090797384..887e1a7332 100644
--- a/src/stores/notifications/RoomNotificationStateStore.ts
+++ b/src/stores/notifications/RoomNotificationStateStore.ts
@@ -82,12 +82,13 @@ export class RoomNotificationStateStore extends AsyncStoreWithClient<IState> {
      */
     public getRoomState(room: Room): RoomNotificationState {
         if (!this.roomMap.has(room)) {
-            this.roomMap.set(room, new RoomNotificationState(room));
             // Not very elegant, but that way we ensure that we start tracking
             // threads notification at the same time at rooms.
             // There are multiple entry points, and it's unclear which one gets
             // called first
-            this.roomThreadsMap.set(room, new ThreadsRoomNotificationState(room));
+            const threadState = new ThreadsRoomNotificationState(room);
+            this.roomThreadsMap.set(room, threadState);
+            this.roomMap.set(room, new RoomNotificationState(room, threadState));
         }
         return this.roomMap.get(room);
     }