diff --git a/gitlab/v4/objects.py b/gitlab/v4/objects.py
index b9769baba..2d7daa293 100644
--- a/gitlab/v4/objects.py
+++ b/gitlab/v4/objects.py
@@ -3282,7 +3282,8 @@ class Project(SaveMixin, ObjectDeleteMixin, RESTObject):
         ('wikis', 'ProjectWikiManager'),
     )
 
-    @cli.register_custom_action('Project', tuple(), ('path', 'ref'))
+    @cli.register_custom_action('Project', tuple(),
+                                ('path', 'ref', 'recursive'))
     @exc.on_http_error(exc.GitlabGetError)
     def repository_tree(self, path='', ref='', recursive=False, **kwargs):
         """Return a list of files in the repository.