diff --git a/Lib/idlelib/aboutDialog.py b/Lib/idlelib/aboutDialog.py
index 8960b00..3d2bcf6 100644
--- a/Lib/idlelib/aboutDialog.py
+++ b/Lib/idlelib/aboutDialog.py
@@ -139,9 +139,11 @@
             try:
                 textFile = codecs.open(fn, 'r')
             except IOError:
+                import tkMessageBox
                 tkMessageBox.showerror(title='File Load Error',
                                        message='Unable to load file '+
-                                       `fileName`+' .')
+                                       `fn`+' .',
+                                       parent=self)
                 return
             else:
                 data = textFile.read()