diff --git a/Lib/idlelib/ToolTip.py b/Lib/idlelib/ToolTip.py
index 2236f76f488..a403804aff1 100644
--- a/Lib/idlelib/ToolTip.py
+++ b/Lib/idlelib/ToolTip.py
@@ -3,7 +3,6 @@
 # may be useful for some purposes in (or almost in ;) the current project scope
 # Ideas gleaned from PySol
 
-import os
 from Tkinter import *
 
 class ToolTipBase: