diff --git a/gui/wxpython/modules/colorrules.py b/gui/wxpython/modules/colorrules.py
index 9e42204ba45..ec7f6043c6e 100644
--- a/gui/wxpython/modules/colorrules.py
+++ b/gui/wxpython/modules/colorrules.py
@@ -1251,7 +1251,7 @@ def _doLayout(self):
 
     def OnPaneChanged(self, event=None):
         # redo the layout
-        self.Layout()
+        self.panel.Layout()
         # and also change the labels
         if self.cp.IsExpanded():
             self.cp.SetLabel('')