diff --git a/colourterm/connectdialog.py b/colourterm/connectdialog.py
index 1aac1ac..6e5733d 100644
--- a/colourterm/connectdialog.py
+++ b/colourterm/connectdialog.py
@@ -209,6 +209,9 @@ class ConnectDialog(QtGui.QDialog, UiConnectDialog):
     def get_hardware_handshake(self):
         return self.hardware_checkbox.isChecked()
 
+    def set_port(self, port):
+        self.port_edit.setEditText(port)
+
     def update_port_combobox(self):
         self.port_edit.clear()
         ports = []
diff --git a/colourterm/mainwindow.py b/colourterm/mainwindow.py
index 5217f37..d221577 100644
--- a/colourterm/mainwindow.py
+++ b/colourterm/mainwindow.py
@@ -202,7 +202,7 @@ class MainWindow(QtGui.QMainWindow, UiMainWindow):
     def on_open_action_triggered(self):
         self.connect_dialog.update_port_combobox()
         settings = QtCore.QSettings()
-        self.connect_dialog.port_edit.setEditText(unicode(settings.value(u'previous-port', u'').toString()))
+        self.connect_dialog.set_port(unicode(settings.value(u'previous-port', u'').toString()))
         if self.connect_dialog.exec_() == QtGui.QDialog.Accepted:
             if not self.device_closed:
                 self.device_closed = True