diff --git a/changelog.d/17453.misc b/changelog.d/17453.misc
new file mode 100644
index 0000000000..2978a52477
--- /dev/null
+++ b/changelog.d/17453.misc
@@ -0,0 +1 @@
+Update experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint to bump room when it is created.
diff --git a/synapse/handlers/sliding_sync.py b/synapse/handlers/sliding_sync.py
index 1b5262d667..a23a6b9dd9 100644
--- a/synapse/handlers/sliding_sync.py
+++ b/synapse/handlers/sliding_sync.py
@@ -53,6 +53,7 @@ logger = logging.getLogger(__name__)
 
 # The event types that clients should consider as new activity.
 DEFAULT_BUMP_EVENT_TYPES = {
+    EventTypes.Create,
     EventTypes.Message,
     EventTypes.Encrypted,
     EventTypes.Sticker,