diff --git a/changelog.d/17723.misc b/changelog.d/17723.misc
new file mode 100644
index 0000000000..1f798b4ccc
--- /dev/null
+++ b/changelog.d/17723.misc
@@ -0,0 +1 @@
+Fetch `bump_stamp`'s more efficiently in Sliding Sync.
diff --git a/synapse/handlers/sliding_sync/__init__.py b/synapse/handlers/sliding_sync/__init__.py
index c3b5bbbf6f..4010f28607 100644
--- a/synapse/handlers/sliding_sync/__init__.py
+++ b/synapse/handlers/sliding_sync/__init__.py
@@ -1171,8 +1171,8 @@ class SlidingSyncHandler:
             # `SCHEMA_COMPAT_VERSION` and run the foreground update for
             # `sliding_sync_joined_rooms`/`sliding_sync_membership_snapshots`
             # (tracked by https://github.com/element-hq/synapse/issues/17623)
-            await self.store.have_finished_sliding_sync_background_jobs()
-            and latest_room_bump_stamp is None
+            latest_room_bump_stamp is None
+            and await self.store.have_finished_sliding_sync_background_jobs()
         ):
             return None