1 files changed, 1 insertions, 0 deletions
diff --git a/synapse/api/urls.py b/synapse/api/urls.py
index 3c6bddff7a..e16c386a14 100644
--- a/synapse/api/urls.py
+++ b/synapse/api/urls.py
@@ -26,6 +26,7 @@ CLIENT_API_PREFIX = "/_matrix/client"
 FEDERATION_PREFIX = "/_matrix/federation"
 FEDERATION_V1_PREFIX = FEDERATION_PREFIX + "/v1"
 FEDERATION_V2_PREFIX = FEDERATION_PREFIX + "/v2"
+FEDERATION_UNSTABLE_PREFIX = FEDERATION_PREFIX + "/unstable"
 STATIC_PREFIX = "/_matrix/static"
 WEB_CLIENT_PREFIX = "/_matrix/client"
 CONTENT_REPO_PREFIX = "/_matrix/content"