diff --git a/Tools/idle/WindowList.py b/Tools/idle/WindowList.py
index b9b0bb11522..9eb7f3dd5e7 100644
--- a/Tools/idle/WindowList.py
+++ b/Tools/idle/WindowList.py
@@ -48,6 +48,11 @@ def get_title(self):
         return self.wm_title()
 
     def wakeup(self):
-        self.tkraise()
-        self.wm_deiconify()
-        self.focus_set()
+        try:
+            self.tkraise()
+            self.wm_deiconify()
+            self.focus_set()
+        except TclError:
+            # This can happen when the window menu was torn off.
+            # Simply ignore it.
+            pass