diff --git a/biscuit/apps/chronos/tables.py b/biscuit/apps/chronos/tables.py
index e7f53f84336bc4f55ce1a44d061558b70369cce9..24b38cab591a2206c9cd792bc5e36104f3dd1cbd 100644
--- a/biscuit/apps/chronos/tables.py
+++ b/biscuit/apps/chronos/tables.py
@@ -26,4 +26,4 @@ class LessonsTable(tables.Table):
     lesson__teachers = tables.Column(accessor='lesson.teacher_names', verbose_name=_('Teachers'))
     lesson__subject = tables.Column(accessor='lesson.subject')
     room = tables.Column(accessor='room')
-    edit_substitution = tables.LinkColumn('edit_substitution_by_id', args=[A('id'), A('week')], text=_('Substitution'))
+    edit_substitution = tables.LinkColumn('edit_substitution_by_id', args=[A('id'), A('_week')], text=_('Substitution'))