diff --git a/pokemontools/map_editor.py b/pokemontools/map_editor.py
index 221be2b..1ea0fad 100644
--- a/pokemontools/map_editor.py
+++ b/pokemontools/map_editor.py
@@ -13,6 +13,7 @@ from Tkinter import (
     LEFT,
     Y,
     X,
+    TclError,
 )
 
 import ttk