1 files changed, 3 insertions, 0 deletions
diff --git a/synapse/config/experimental.py b/synapse/config/experimental.py
index 4009add01d..d9bdd66d55 100644
--- a/synapse/config/experimental.py
+++ b/synapse/config/experimental.py
@@ -98,6 +98,9 @@ class ExperimentalConfig(Config):
         # MSC3773: Thread notifications
         self.msc3773_enabled: bool = experimental.get("msc3773_enabled", False)
 
+        # MSC3664: Pushrules to match on related events
+        self.msc3664_enabled: bool = experimental.get("msc3664_enabled", False)
+
         # MSC3848: Introduce errcodes for specific event sending failures
         self.msc3848_enabled: bool = experimental.get("msc3848_enabled", False)