diff --git a/artiq/master/log.py b/artiq/master/log.py
index 958076505..d759d1309 100644
--- a/artiq/master/log.py
+++ b/artiq/master/log.py
@@ -1,7 +1,6 @@
 import logging
 import logging.handlers
 
-from artiq.protocols.sync_struct import Notifier
 from artiq.protocols.logging import SourceFilter