diff --git a/artiq/gui/applets.py b/artiq/gui/applets.py
index d81e007db..1e9e14740 100644
--- a/artiq/gui/applets.py
+++ b/artiq/gui/applets.py
@@ -167,7 +167,6 @@ class _AppletDock(QDockWidgetCloseDetect):
         self.starting_stopping = False
 
         if delete_self:
-            self.setParent(None)
             self.deleteLater()
 
     async def restart(self):
diff --git a/artiq/gui/log.py b/artiq/gui/log.py
index 0f1677e5f..56215f10a 100644
--- a/artiq/gui/log.py
+++ b/artiq/gui/log.py
@@ -356,7 +356,6 @@ class LogDockManager:
 
     def on_dock_closed(self, name):
         dock = self.docks[name]
-        dock.setParent(None)
         dock.deleteLater()
         del self.docks[name]
         self.update_closable()