diff --git a/apps/settings/models.py b/apps/settings/models.py
index 9d395656c..0a986efcb 100644
--- a/apps/settings/models.py
+++ b/apps/settings/models.py
@@ -90,7 +90,7 @@ class Setting(models.Model):
         setting = cls.objects.filter(name='AUTH_LDAP').first()
         if not setting:
             return
-        ldap_backend = settings.AUTH_BACKEND_LABEL_MAPPING['ldap']
+        ldap_backend = settings.AUTH_BACKEND_LDAP
         backends = settings.AUTHENTICATION_BACKENDS
         has = ldap_backend in backends
         if setting.cleaned_value and not has: