--- a/eric6/Preferences/ToolConfigurationDialog.py	Mon Mar 01 17:48:43 2021 +0100
+++ b/eric6/Preferences/ToolConfigurationDialog.py	Tue Mar 02 17:17:09 2021 +0100
@@ -127,7 +127,7 @@
             return
         
         if len(self.toolsList.findItems(
-                menutext, Qt.MatchFlags(Qt.MatchExactly))):
+                menutext, Qt.MatchFlags(Qt.MatchFlag.MatchExactly))):
             E5MessageBox.critical(
                 self,
                 self.tr("Add tool entry"),