--- a/eric6/MicroPython/ConnectionSelectionDialog.py	Mon Mar 01 17:48:43 2021 +0100
+++ b/eric6/MicroPython/ConnectionSelectionDialog.py	Tue Mar 02 17:17:09 2021 +0100
@@ -21,8 +21,8 @@
     Class implementing a dialog to select the port to connect to and the type
     of the attached device.
     """
-    PortNameRole = Qt.UserRole
-    VidPidRole = Qt.UserRole + 1
+    PortNameRole = Qt.ItemDataRole.UserRole
+    VidPidRole = Qt.ItemDataRole.UserRole + 1
     
     def __init__(self, ports, currentPort, currentType, parent=None):
         """
@@ -79,7 +79,7 @@
         """
         Private method to update the status of the OK button.
         """
-        self.buttonBox.button(QDialogButtonBox.Ok).setEnabled(
+        self.buttonBox.button(QDialogButtonBox.StandardButton.Ok).setEnabled(
             bool(self.portNameComboBox.currentData(self.PortNameRole)) and
             bool(self.deviceTypeComboBox.currentData())
         )