diff --git a/IPython/lib/inputhook.py b/IPython/lib/inputhook.py
index bdb7be3..44cebbb 100644
--- a/IPython/lib/inputhook.py
+++ b/IPython/lib/inputhook.py
@@ -320,8 +320,11 @@ class InputHookManager(object):
         """
         self._current_gui = GUI_TK
         if app is None:
-            import tkinter
-            app = tkinter.Tk()
+            try:
+                from tkinter import Tk  # Py 3
+            except ImportError:
+                from Tkinter import Tk  # Py 2
+            app = Tk()
             app.withdraw()
             self._apps[GUI_TK] = app
             return app