diff --git a/gui/marketBrowser.py b/gui/marketBrowser.py
index f33166bc3..2b71b6dc4 100644
--- a/gui/marketBrowser.py
+++ b/gui/marketBrowser.py
@@ -247,7 +247,7 @@ class MarketBrowser(wx.Panel):
 
 class MarketTree(wx.TreeCtrl):
     def __init__(self, parent):
-        wx.TreeCtrl.__init__(parent)
+        wx.TreeCtrl.__init__(self, parent)
 
     def OnEraseBackGround(self, event):
         #Prevent flicker by not letting the parent's method get called.