1 files changed, 2 insertions, 0 deletions
diff --git a/synapse/config/experimental.py b/synapse/config/experimental.py
index 595eb007a5..933779c23a 100644
--- a/synapse/config/experimental.py
+++ b/synapse/config/experimental.py
@@ -83,6 +83,8 @@ class ExperimentalConfig(Config):
         # MSC3786 (Add a default push rule to ignore m.room.server_acl events)
         self.msc3786_enabled: bool = experimental.get("msc3786_enabled", False)
 
+        # MSC3771: Thread read receipts
+        self.msc3771_enabled: bool = experimental.get("msc3771_enabled", False)
         # MSC3772: A push rule for mutual relations.
         self.msc3772_enabled: bool = experimental.get("msc3772_enabled", False)