1 files changed, 3 insertions, 0 deletions
diff --git a/synapse/config/experimental.py b/synapse/config/experimental.py
index 90d19849ff..94a25c7ee8 100644
--- a/synapse/config/experimental.py
+++ b/synapse/config/experimental.py
@@ -436,6 +436,9 @@ class ExperimentalConfig(Config):
                 ("experimental", "msc4108_delegation_endpoint"),
             )
 
+        # MSC4133: Custom profile fields
+        self.msc4133_enabled: bool = experimental.get("msc4133_enabled", False)
+
         # MSC4210: Remove legacy mentions
         self.msc4210_enabled: bool = experimental.get("msc4210_enabled", False)