diff --git a/artiq/browser/files.py b/artiq/browser/files.py
index 57672a9a6..21dd504ba 100644
--- a/artiq/browser/files.py
+++ b/artiq/browser/files.py
@@ -4,8 +4,6 @@ import os
 import h5py
 from PyQt5 import QtCore, QtWidgets, QtGui
 
-from artiq.protocols import pyon
-
 logger = logging.getLogger(__name__)