diff --git a/CHANGES.md b/CHANGES.md
index 0e451f983c..1fac16580d 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,12 @@
+Synapse 1.35.0rc2 (2021-05-27)
+==============================
+
+Bugfixes
+--------
+
+- Fix a bug introduced in v1.35.0rc1 when calling the spaces summary API via a GET request. ([\#10079](https://github.com/matrix-org/synapse/issues/10079))
+
+
 Synapse 1.35.0rc1 (2021-05-25)
 ==============================
 
diff --git a/synapse/__init__.py b/synapse/__init__.py
index e60e9db71e..6faf31dbbc 100644
--- a/synapse/__init__.py
+++ b/synapse/__init__.py
@@ -47,7 +47,7 @@ try:
 except ImportError:
     pass
 
-__version__ = "1.35.0rc1"
+__version__ = "1.35.0rc2"
 
 if bool(os.environ.get("SYNAPSE_TEST_PATCH_LOG_CONTEXTS", False)):
     # We import here so that we don't have to install a bunch of deps when
diff --git a/synapse/federation/transport/server.py b/synapse/federation/transport/server.py
index 00ff02c7cb..59e0a434dc 100644
--- a/synapse/federation/transport/server.py
+++ b/synapse/federation/transport/server.py
@@ -1398,7 +1398,7 @@ class FederationSpaceSummaryServlet(BaseFederationServlet):
                 )
 
         return 200, await self.handler.federation_space_summary(
-            room_id, suggested_only, max_rooms_per_space, exclude_rooms
+            origin, room_id, suggested_only, max_rooms_per_space, exclude_rooms
         )
 
     # TODO When switching to the stable endpoint, remove the POST handler.