diff --git a/tryton/gui/window/view_form/view/list.py b/tryton/gui/window/view_form/view/list.py
index e7db163db0..07b4c5fabd 100644
--- a/tryton/gui/window/view_form/view/list.py
+++ b/tryton/gui/window/view_form/view/list.py
@@ -634,7 +634,7 @@ class ViewList(ParserView):
             if last_col and last_col.name in fields:
                 del fields[last_col.name]
 
-            if fields:
+            if fields and any(fields.itervalues()):
                 try:
                     rpc.execute('model', 'ir.ui.view_tree_width', 'set_width',
                             self.screen.model_name, fields, rpc.CONTEXT)