1 files changed, 3 insertions, 0 deletions
diff --git a/synapse/config/experimental.py b/synapse/config/experimental.py
index f05a803a71..09d692d9a1 100644
--- a/synapse/config/experimental.py
+++ b/synapse/config/experimental.py
@@ -61,3 +61,6 @@ class ExperimentalConfig(Config):
         self.msc2409_to_device_messages_enabled: bool = experimental.get(
             "msc2409_to_device_messages_enabled", False
         )
+
+        # MSC3706 (server-side support for partial state in /send_join responses)
+        self.msc3706_enabled: bool = experimental.get("msc3706_enabled", False)