diff --git a/tryton/gui/window/view_form/view/__init__.py b/tryton/gui/window/view_form/view/__init__.py
index 3de6034af9..63852cbbb0 100644
--- a/tryton/gui/window/view_form/view/__init__.py
+++ b/tryton/gui/window/view_form/view/__init__.py
@@ -99,7 +99,7 @@ class XMLViewParser:
                 node_attrs[name] = bool(int(node_attrs[name]))
         for name in [
                 'yexpand', 'yfill', 'xexpand', 'xfill', 'colspan', 'position',
-                'height', 'width']:
+                'height', 'width', 'expand']:
             if name in node_attrs:
                 node_attrs[name] = int(node_attrs[name])
         for name in ['xalign', 'yalign']:
diff --git a/tryton/gui/window/view_form/view/list.py b/tryton/gui/window/view_form/view/list.py
index d06c60d81e..5eeec594e1 100644
--- a/tryton/gui/window/view_form/view/list.py
+++ b/tryton/gui/window/view_form/view/list.py
@@ -420,7 +420,7 @@ class TreeXMLViewParser(XMLViewParser):
             column.set_fixed_width(width)
         column.set_min_width(1)
 
-        expand = attributes.get('expand', False)
+        expand = bool(attributes.get('expand', False))
         column.set_expand(expand)
         column.set_resizable(True)
         if attributes.get('widget') != 'text':