diff --git a/README.rst b/README.rst
index b3dec67c..b6a2bda0 100644
--- a/README.rst
+++ b/README.rst
@@ -41,7 +41,7 @@ In order to make your models versioned you need two things:
     from sqlalchemy_continuum import make_versioned
 
 
-    make_versioned()
+    make_versioned(user_cls=None)
 
 
     class Article(Base):