1 files changed, 3 insertions, 0 deletions
diff --git a/synapse/config/experimental.py b/synapse/config/experimental.py
index 749452ce93..cda7afc5c4 100644
--- a/synapse/config/experimental.py
+++ b/synapse/config/experimental.py
@@ -332,6 +332,9 @@ class ExperimentalConfig(Config):
         # MSC3391: Removing account data.
         self.msc3391_enabled = experimental.get("msc3391_enabled", False)
 
+        # MSC3575 (Sliding Sync API endpoints)
+        self.msc3575_enabled: bool = experimental.get("msc3575_enabled", False)
+
         # MSC3773: Thread notifications
         self.msc3773_enabled: bool = experimental.get("msc3773_enabled", False)