diff --git a/event-schemas/schema/m.room.server_acl b/event-schemas/schema/m.room.server_acl
index c6adaf05..86d83832 100644
--- a/event-schemas/schema/m.room.server_acl
+++ b/event-schemas/schema/m.room.server_acl
@@ -85,4 +85,4 @@ properties:
     type: string
   type:
     enum: ['m.room.server_acl']
-    type: enum
+    type: string