--- a/src/pyams_content/shared/site/zmi/container.py	Tue Jan 16 15:25:25 2018 +0100
+++ b/src/pyams_content/shared/site/zmi/container.py	Tue Jan 16 15:25:51 2018 +0100
@@ -391,11 +391,6 @@
 class SiteContainerTreeOwnerColumn(SharedToolDashboardOwnerColumn):
     """Site container tree owner column"""
 
-    _header = _("Owner")
-    cssClasses = {'th': 'col-xs-hide',
-                  'td': 'col-xs-hide'}
-    weight = 35
-
     def getValue(self, obj):
         target = obj.get_target() if IContentLink.providedBy(obj) else obj
         if ISharedContent.providedBy(target):