1 files changed, 1 insertions, 0 deletions
diff --git a/synapse/rest/client/v2_alpha/sync.py b/synapse/rest/client/v2_alpha/sync.py
index 6779df952f..2b84eb89c0 100644
--- a/synapse/rest/client/v2_alpha/sync.py
+++ b/synapse/rest/client/v2_alpha/sync.py
@@ -236,6 +236,7 @@ class SyncRestServlet(RestServlet):
                 "leave": sync_result.groups.leave,
             },
             "device_one_time_keys_count": sync_result.device_one_time_keys_count,
+            "org.matrix.msc2732.device_unused_fallback_key_types": sync_result.device_unused_fallback_key_types,
             "next_batch": await sync_result.next_batch.to_string(self.store),
         }