1 files changed, 3 insertions, 0 deletions
diff --git a/synapse/config/experimental.py b/synapse/config/experimental.py
index 99185db93d..fd14db0d02 100644
--- a/synapse/config/experimental.py
+++ b/synapse/config/experimental.py
@@ -447,3 +447,6 @@ class ExperimentalConfig(Config):
 
         # MSC4151: Report room API (Client-Server API)
         self.msc4151_enabled: bool = experimental.get("msc4151_enabled", False)
+
+        # MSC4210: Remove legacy mentions
+        self.msc4210_enabled: bool = experimental.get("msc4210_enabled", False)