diff --git a/django/core/management/commands/dumpdata.py b/django/core/management/commands/dumpdata.py
index 7e05b89160..bb1e99d953 100644
--- a/django/core/management/commands/dumpdata.py
+++ b/django/core/management/commands/dumpdata.py
@@ -15,7 +15,7 @@ class Command(BaseCommand):
             help='App to exclude (use multiple --exclude to exclude multiple apps).'),
     )
     help = 'Output the contents of the database as a fixture of the given format.'
-    args = '[appname ...]'
+    args = '[appname appname.ModelName ...]'
 
     def handle(self, *app_labels, **options):
         from django.db.models import get_app, get_apps, get_models, get_model