diff --git a/src/advanced_configuration_window.py b/src/advanced_configuration_window.py
index dfb5ac043053d757e5eeda91d1d79ec1816ac816..f4823cfa8e9d35687d70bf3dbed22925ab6d831c 100644
--- a/src/advanced_configuration_window.py
+++ b/src/advanced_configuration_window.py
@@ -116,7 +116,9 @@ 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()
         treeview.insert_column_with_attributes(-1, _('Type'),