diff --git a/docs/cookbook.rst b/docs/cookbook.rst
index 93b781b..8fcc467 100644
--- a/docs/cookbook.rst
+++ b/docs/cookbook.rst
@@ -136,8 +136,11 @@ Celery's documentation`_:
     os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'mysite.settings')
     os.environ.setdefault('DJANGO_CONFIGURATION', 'MySiteConfiguration')
 
-    import configurations
-    configurations.setup()
+    # The extra check is necessary to not call django.setup() twice.
+    from configurations import importer
+    if not importer.installed:
+        import configurations
+            configurations.setup()
 
     app = Celery('mysite')
     app.config_from_object('django.conf:settings')