diff --git a/openstackclient/identity/v3/user.py b/openstackclient/identity/v3/user.py
index c1a0a43c6..b72e0d158 100644
--- a/openstackclient/identity/v3/user.py
+++ b/openstackclient/identity/v3/user.py
@@ -369,7 +369,7 @@ class SetUser(command.Command):
         if parsed_args.project:
             project_id = utils.find_resource(
                 identity_client.projects, parsed_args.project).id
-            kwargs['project'] = project_id
+            kwargs['default_project'] = project_id
         kwargs['enabled'] = user.enabled
         if parsed_args.enable:
             kwargs['enabled'] = True
diff --git a/openstackclient/tests/identity/v3/test_user.py b/openstackclient/tests/identity/v3/test_user.py
index ab6e6bce2..18fe9016d 100644
--- a/openstackclient/tests/identity/v3/test_user.py
+++ b/openstackclient/tests/identity/v3/test_user.py
@@ -885,7 +885,7 @@ class TestUserSet(TestUser):
         # Set expected values
         kwargs = {
             'enabled': True,
-            'project': identity_fakes.project_id,
+            'default_project': identity_fakes.project_id,
         }
         # UserManager.update(user, name=, domain=, project=, password=,
         #     email=, description=, enabled=, default_project=)