diff --git a/trytond/model/modelview.py b/trytond/model/modelview.py
index b1ba9e0b43..491e54629c 100644
--- a/trytond/model/modelview.py
+++ b/trytond/model/modelview.py
@@ -37,7 +37,7 @@ def _inherit_apply(src, inherit):
             pos = element2.get('position', 'inside')
             if pos == 'replace':
                 parent = element.getparent()
-                if parent is not None:
+                if not parent:
                     tree_src, = element2
                     continue
                 enext = element.getnext()