diff --git a/wxPython/demo/TreeMixin.py b/wxPython/demo/TreeMixin.py
index d05bff13ce..f4b2c131b0 100644
--- a/wxPython/demo/TreeMixin.py
+++ b/wxPython/demo/TreeMixin.py
@@ -1,5 +1,5 @@
 import wx, wx.lib.customtreectrl, wx.gizmos
-import treemixin
+from wx.lib.mixins import treemixin
 
 
 class TreeModel(object):