diff --git a/lib/src/client.dart b/lib/src/client.dart
index 62841f7..6c2a03e 100644
--- a/lib/src/client.dart
+++ b/lib/src/client.dart
@@ -1408,6 +1408,7 @@ class Client {
             _pendingToDeviceEvents.add(toDeviceEvent);
             break;
           }
+          room ??= Room(client: this, id: roomId);
           final String sessionId = toDeviceEvent.content['session_id'];
           if (toDeviceEvent.type == 'm.room_key' &&
               userDeviceKeys.containsKey(toDeviceEvent.sender) &&