diff --git a/portail_citoyen2/settings.py b/portail_citoyen2/settings.py
index 22c1966..727de8b 100644
--- a/portail_citoyen2/settings.py
+++ b/portail_citoyen2/settings.py
@@ -311,7 +311,7 @@ except ImportError, e:
 if not CMS_TEMPLATES:
     raise ImproperlyConfigured('You must define CMS_TEMPLATES')
 
-if 'MULTITENANT_MODE' is os.environ:
+if 'MULTITENANT_MODE' in os.environ:
     try:
         from tenant_settings import *
     except ImportError: