diff --git a/pytec/tec_qt.py b/pytec/tec_qt.py
index c983abe..49339a7 100755
--- a/pytec/tec_qt.py
+++ b/pytec/tec_qt.py
@@ -301,6 +301,7 @@ class MainWindow(QtWidgets.QMainWindow):
             self.loading_spinner.start()
             self.loading_spinner.show()
 
+    @asyncSlot(int)
     async def save_cfg_request(self, ch):
         assert self.thermostat.connected()
 
@@ -311,6 +312,7 @@ class MainWindow(QtWidgets.QMainWindow):
         assert self.thermostat.connected()
 
         await self.thermostat.load_cfg(str(ch))
+
     @asyncSlot(bool)
     async def reset_request(self, _):
         assert self.thermostat.connected()