diff --git a/examples/user_interfaces/mathtext_wx.py b/examples/user_interfaces/mathtext_wx.py
index 06197bb164ed..84e0f98c1b9e 100644
--- a/examples/user_interfaces/mathtext_wx.py
+++ b/examples/user_interfaces/mathtext_wx.py
@@ -37,7 +37,7 @@ def mathtext_to_wxbitmap(s):
 class CanvasFrame(wx.Frame):
     def __init__(self, parent, title):
         wx.Frame.__init__(self, parent, -1, title, size=(550, 350))
-        self.SetBackgroundColour(wx.NamedColor("WHITE"))
+        self.SetBackgroundColour(wx.NamedColour("WHITE"))
 
         self.figure = Figure()
         self.axes = self.figure.add_subplot(111)