diff --git a/src/advanced_configuration_window.py b/src/advanced_configuration_window.py
index c78e6ca03..96f8235ef 100644
--- a/src/advanced_configuration_window.py
+++ b/src/advanced_configuration_window.py
@@ -117,7 +117,9 @@ class AdvancedConfigurationWindow(object):
         col.set_cell_data_func(renderer_text, self.cb_value_column_data)
 
         col.props.resizable = True
+        # set max width only for initializing the treeview.
         col.set_max_width(250)
+        gobject.idle_add(col.set_max_width, -1)
 
         renderer_text = Gtk.CellRendererText()
         col = Gtk.TreeViewColumn(_('Type'), renderer_text, text = 2)