diff --git a/synapse/handlers/read_marker.py b/synapse/handlers/read_marker.py

index bd8160e7ed..58593e570e 100644
--- a/synapse/handlers/read_marker.py
+++ b/synapse/handlers/read_marker.py
@@ -17,17 +17,14 @@ from typing import TYPE_CHECKING
 
 from synapse.util.async_helpers import Linearizer
 
-from ._base import BaseHandler
-
 if TYPE_CHECKING:
     from synapse.server import HomeServer
 
 logger = logging.getLogger(__name__)
 
 
-class ReadMarkerHandler(BaseHandler):
+class ReadMarkerHandler:
     def __init__(self, hs: "HomeServer"):
-        super().__init__(hs)
         self.server_name = hs.config.server.server_name
         self.store = hs.get_datastore()
         self.account_data_handler = hs.get_account_data_handler()