diff --git a/videv.py b/videv.py
index ced6ff2..df1abf3 100644
--- a/videv.py
+++ b/videv.py
@@ -156,17 +156,19 @@ class videv_audio_player(videv_base):
         self.__tx__(self.KEY_TITLE, data or self.NO_TITLE)
 
 
-class all_off(videv_base):
-    def __init__(self, mqtt_client, topic, room_collection):
+class videv_all_off(videv_base):
+    def __init__(self, mqtt_client, topic):
         super().__init__(mqtt_client, topic)
         # init __inst_dict__
         self.__inst_dict__ = {}
+
+    def connect_room_collection(self, room_collection):
         self.__add_instances__("all", room_collection)
         # register mqtt callbacks for all my keys
         for key in self.__inst_dict__:
-            all_off_topic = "/".join([topic, key])
+            all_off_topic = "/".join([self.topic, key])
             logger.info("Addin all_off callback with topic %s", repr(all_off_topic))
-            mqtt_client.add_callback(all_off_topic, self.rx_all_off)
+            self.mqtt_client.add_callback(all_off_topic, self.rx_all_off)
 
     def __check_inst_capabilities__(self, name, inst):
         if hasattr(inst, "ADD_TO_VIDEV_ALL_OFF"):