diff --git a/manager/templatetags/manager.py b/manager/templatetags/manager.py
index 7c2b13f..edbcd10 100644
--- a/manager/templatetags/manager.py
+++ b/manager/templatetags/manager.py
@@ -10,6 +10,7 @@ def orgaObjects(cls, orga):
 def directUserOrgas(user):
     return sorted(user.organization_set.all(), key=lambda x: str(x))
 
+@register.simple_tag
 def directOrgaString(user):
     return ", ".join(str(orga) for orga in directUserOrgas(user))