diff --git a/pytec/tec_qt.py b/pytec/tec_qt.py
index f787f12..9c730e8 100755
--- a/pytec/tec_qt.py
+++ b/pytec/tec_qt.py
@@ -133,13 +133,6 @@ class MainWindow(QtWidgets.QMainWindow):
             lambda: self.thermostat.set_update_s(self.report_refresh_spin.value())
         )
 
-        if args.connect:
-            if args.HOST:
-                self.host_set_line.setText(args.HOST)
-            if args.PORT:
-                self.port_set_spin.setValue(int(args.PORT))
-            self.connect_btn.click()
-
     @asyncSlot(ThermostatConnectionState)
     async def _on_connection_changed(self, state):
         self.graph_group.setEnabled(state == ThermostatConnectionState.CONNECTED)
@@ -242,6 +235,13 @@ async def coro_main():
     main_window = MainWindow(args)
     main_window.show()
 
+    if args.connect:
+        if args.HOST:
+            main_window.conn_menu.host_set_line.setText(args.HOST)
+        if args.PORT:
+            main_window.conn_menu.port_set_spin.setValue(int(args.PORT))
+        main_window.connect_btn.click()
+
     await app_quit_event.wait()