diff --git a/gui/PFListPane.py b/gui/PFListPane.py
index 40835dd3a..a61b25738 100644
--- a/gui/PFListPane.py
+++ b/gui/PFListPane.py
@@ -40,7 +40,7 @@ class PFListPane(wx.ScrolledWindow):
         self.Bind(wx.EVT_MOUSE_CAPTURE_CHANGED, self.ForceFocus)
 
     def ForceFocus(self,event):
-        if self.FindFocus().Parent != self:
+        if self.FindFocus() and self.FindFocus().Parent != self:
             self.SetFocus()
         event.Skip()