1 files changed, 3 insertions, 1 deletions
diff --git a/Lib/idlelib/pyshell.py b/Lib/idlelib/pyshell.py
index adc3028..6fa1382 100755
--- a/Lib/idlelib/pyshell.py
+++ b/Lib/idlelib/pyshell.py
@@ -1061,8 +1061,10 @@ class PyShell(OutputWindow):
                    (sys.version, sys.platform, self.COPYRIGHT, nosub))
         self.text.focus_force()
         self.showprompt()
+        # User code should use separate default Tk root window
         import tkinter
-        tkinter._default_root = None # 03Jan04 KBK What's this?
+        tkinter._support_default_root = True
+        tkinter._default_root = None
         return True
 
     def stop_readline(self):