diff --git a/crates/ruma-client-api/src/sync/sync_events.rs b/crates/ruma-client-api/src/sync/sync_events.rs
index 3c89ab7d..8eef4a61 100644
--- a/crates/ruma-client-api/src/sync/sync_events.rs
+++ b/crates/ruma-client-api/src/sync/sync_events.rs
@@ -11,10 +11,10 @@ pub mod v3;
 #[cfg(feature = "unstable-msc3575")]
 pub mod v4;
 
-/// Unread notifications count.
+/// Unread notifications count in threads.
 #[derive(Clone, Debug, Default, Deserialize, Serialize)]
 #[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
-pub struct UnreadNotificationsCount {
+pub struct UnreadCountThread {
     /// The last acked/read event or message
     #[serde(skip_serializing_if = "Option::is_none")]
     pub last_ack: Option<OwnedEventId>,
@@ -38,8 +38,37 @@ pub struct UnreadNotificationsCount {
     pub messages: Option<UInt>,
 }
 
-impl UnreadNotificationsCount {
-    /// Creates an empty `UnreadNotificationsCount`.
+/// Unread notifications count in rooms.
+#[derive(Clone, Debug, Default, Deserialize, Serialize)]
+#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
+pub struct UnreadCountRoom {
+    /// The sum of all threaded `mention_user`s
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub mention_user: Option<UInt>,
+
+    /// The sum of all threaded `mention_bulk`s
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub mention_bulk: Option<UInt>,
+
+    /// The sum of all threaded `notify`s
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub notify: Option<UInt>,
+
+    /// The sum of all threaded `message`s
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub messages: Option<UInt>,
+    
+    /// The total number of threads that don't have an `last_ack` yet
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub threads_unseen: Option<UInt>,
+    
+    /// The total number of unread threads where `messages > 0` / `last_ack` is no longer the latest message
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub threads_unread: Option<UInt>,
+}
+
+impl UnreadCountThread {
+    /// Creates an empty `UnreadCountThread`.
     pub fn new() -> Self {
         Default::default()
     }
@@ -54,6 +83,23 @@ impl UnreadNotificationsCount {
     }
 }
 
+impl UnreadCountRoom {
+    /// Creates an empty `UnreadCountRoom`.
+    pub fn new() -> Self {
+        Default::default()
+    }
+
+    /// Returns true if there are no notification count updates.
+    pub fn is_empty(&self) -> bool {
+        self.mention_user.is_none()
+            && self.mention_bulk.is_none()
+            && self.notify.is_none()
+            && self.messages.is_none()
+            && self.threads_unseen.is_none()
+            && self.threads_unread.is_none()
+    }
+}
+
 /// Information on E2E device updates.
 #[derive(Clone, Debug, Default, Deserialize, Serialize)]
 #[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
diff --git a/crates/ruma-client-api/src/sync/sync_events/v3.rs b/crates/ruma-client-api/src/sync/sync_events/v3.rs
index f94db6c7..e221ee05 100644
--- a/crates/ruma-client-api/src/sync/sync_events/v3.rs
+++ b/crates/ruma-client-api/src/sync/sync_events/v3.rs
@@ -19,7 +19,7 @@ use ruma_events::{
 };
 use serde::{Deserialize, Serialize};
 
-use super::{DeviceLists, UnreadNotificationsCount};
+use super::{DeviceLists, UnreadCountRoom};
 use crate::filter::FilterDefinition;
 
 const METADATA: Metadata = metadata! {
@@ -250,8 +250,8 @@ pub struct JoinedRoom {
     ///
     /// [unread notifications]: https://spec.matrix.org/latest/client-server-api/#receiving-notifications
     /// [`RoomEventFilter`]: crate::filter::RoomEventFilter
-    #[serde(default, skip_serializing_if = "UnreadNotificationsCount::is_empty")]
-    pub unread_notifications: UnreadNotificationsCount,
+    #[serde(default, skip_serializing_if = "UnreadCountRoom::is_empty")]
+    pub unread_notifications: UnreadCountRoom,
 
     /// Counts of [unread notifications] for threads in this room.
     ///
@@ -262,7 +262,7 @@ pub struct JoinedRoom {
     /// [unread notifications]: https://spec.matrix.org/latest/client-server-api/#receiving-notifications
     /// [`RoomEventFilter`]: crate::filter::RoomEventFilter
     #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
-    pub unread_thread_notifications: BTreeMap<OwnedEventId, UnreadNotificationsCount>,
+    pub unread_thread_notifications: BTreeMap<OwnedEventId, UnreadCountRoom>,
 
     /// The timeline of messages and state changes in the room.
     #[serde(default, skip_serializing_if = "Timeline::is_empty")]
diff --git a/crates/ruma-client-api/src/sync/sync_events/v4.rs b/crates/ruma-client-api/src/sync/sync_events/v4.rs
index 2fb90c72..d36d5539 100644
--- a/crates/ruma-client-api/src/sync/sync_events/v4.rs
+++ b/crates/ruma-client-api/src/sync/sync_events/v4.rs
@@ -21,7 +21,7 @@ use ruma_events::{
 };
 use serde::{de::Error as _, Deserialize, Serialize};
 
-use super::{DeviceLists, UnreadNotificationsCount};
+use super::{DeviceLists, UnreadCountRoom, UnreadCountThread};
 
 const METADATA: Metadata = metadata! {
     method: POST,
@@ -424,8 +424,8 @@ pub struct SlidingSyncRoom {
     pub invite_state: Option<Vec<Raw<AnyStrippedStateEvent>>>,
 
     /// Counts of unread notifications for this room.
-    #[serde(default, skip_serializing_if = "UnreadNotificationsCount::is_empty")]
-    pub unreads: UnreadNotificationsCount,
+    #[serde(default, skip_serializing_if = "UnreadCountRoom::is_empty")]
+    pub unreads: UnreadCountRoom,
 
     /// Counts of unread notifications for threads in this room.
     ///
@@ -433,7 +433,7 @@ pub struct SlidingSyncRoom {
     ///
     /// Only set if `unread_thread_notifications` was set to `true` in the [`RoomEventFilter`].
     #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
-    pub unreads_threaded: BTreeMap<OwnedEventId, UnreadNotificationsCount>,
+    pub unreads_threaded: BTreeMap<OwnedEventId, UnreadCountThread>,
 
     /// The timeline of messages and state changes in the room.
     #[serde(default, skip_serializing_if = "Vec::is_empty")]