diff --git a/lib/tfw/networking/server/event_handler_connector.py b/lib/tfw/networking/server/event_handler_connector.py
index 5075c56..bc6c9be 100644
--- a/lib/tfw/networking/server/event_handler_connector.py
+++ b/lib/tfw/networking/server/event_handler_connector.py
@@ -21,6 +21,10 @@ class EventHandlerDownlinkConnector(ZMQConnectorBase):
         self._zmq_pull_socket.bind(address)
         LOG.debug('Pull socket bound to %s', address)
 
+    def register_callback(self, callback):
+        callback = with_deserialize_tfw_msg(callback)
+        self._zmq_pull_stream.on_recv(callback)
+
 
 class EventHandlerUplinkConnector(ZMQConnectorBase):
     def __init__(self, zmq_context=None):
@@ -30,11 +34,9 @@ class EventHandlerUplinkConnector(ZMQConnectorBase):
         self._zmq_pub_socket.bind(address)
         LOG.debug('Pub socket bound to %s', address)
 
-
-class EventHandlerConnector(EventHandlerDownlinkConnector, EventHandlerUplinkConnector):
-    def register_callback(self, callback):
-        callback = with_deserialize_tfw_msg(callback)
-        self._zmq_pull_stream.on_recv(callback)
-
     def send_message(self, message: dict):
         self._zmq_pub_socket.send_multipart(serialize_tfw_msg(message))
+
+
+class EventHandlerConnector(EventHandlerDownlinkConnector, EventHandlerUplinkConnector):
+    pass