diff --git a/pytec/tec_qt.py b/pytec/tec_qt.py
index 4075a0c..800e881 100644
--- a/pytec/tec_qt.py
+++ b/pytec/tec_qt.py
@@ -221,7 +221,7 @@ class MainWindow(QtWidgets.QMainWindow):
         await self.thermostat.set_report_mode(enabled)
 
     @asyncClose
-    async def closeEvent(self, event):
+    async def closeEvent(self, _event):
         try:
             await self.bail()
         except: