diff --git a/wxPython/demo/ColorPanel.py b/wxPython/demo/ColorPanel.py
index a5b6a91cc7..3bb606066d 100644
--- a/wxPython/demo/ColorPanel.py
+++ b/wxPython/demo/ColorPanel.py
@@ -12,6 +12,8 @@ class ColoredPanel(wx.Window):
     def __init__(self, parent, color):
         wx.Window.__init__(self, parent, -1, style = wx.SIMPLE_BORDER)
         self.SetBackgroundColour(color)
+        self.SetBackgroundStyle(wx.BG_STYLE_CUSTOM)
+
 
 #---------------------------------------------------------------------------