diff --git a/auquotidien/modules/root.py b/auquotidien/modules/root.py
index ffee0dc..e7bdbc2 100644
--- a/auquotidien/modules/root.py
+++ b/auquotidien/modules/root.py
@@ -287,7 +287,7 @@ class AlternateRootDirectory(OldRootDirectory):
         response.filter['auquotidien'] = True
         if not path or (path[0] not in ('api', 'backoffice') and not get_request().is_json()):
             # api & backoffice have no use for a side box
-            response.filter['gauche'] = self.box_side(path)
+            response.filter['gauche'] = lambda x: self.box_side(path)
             response.filter['keywords'] = template.get_current_theme().get('keywords')
         get_publisher().substitutions.feed(self)