diff --git a/lib/src/event.dart b/lib/src/event.dart
index c4060390..3e693f60 100644
--- a/lib/src/event.dart
+++ b/lib/src/event.dart
@@ -408,6 +408,7 @@ class Event {
           'request_id': base64.encode(utf8.encode(content['session_id'])),
           'requesting_device_id': room.client.deviceID,
         },
+        encrypted: false,
         toUsers: users);
     await room.client.sendToDevice(
         [],