diff --git a/product/ERP5Form/ListBox.py b/product/ERP5Form/ListBox.py
index d423c67fd075bb14c082541375e1e1a4a193ed8c..10b4d5702a2f0068fad60afcd58ec0bff33168e4 100644
--- a/product/ERP5Form/ListBox.py
+++ b/product/ERP5Form/ListBox.py
@@ -1911,7 +1911,7 @@ class ListBoxHTMLRendererLine(ListBoxRendererLine):
     url_column_dict = dict(self.renderer.getUrlColumnList())
     selection = self.renderer.getSelection()
     selection_name = self.renderer.getSelectionName()
-    ignore_layout = self.renderer.request.get('ignore_layout', 0)
+    ignore_layout = int(self.renderer.request.get('ignore_layout', 0))
 
     html_list = []