diff --git a/doc/src/connection.rst b/doc/src/connection.rst
index 9b7ad854..f5df3e07 100644
--- a/doc/src/connection.rst
+++ b/doc/src/connection.rst
@@ -348,7 +348,7 @@ The ``connection`` class
         pair: Transaction; Autocommit
         pair: Transaction; Isolation level
 
-    .. method:: set_session(*, isolation_level, readonly, deferrable, autocommit)
+    .. method:: set_session(*, isolation_level=None, readonly=None, deferrable=None, autocommit=None)
 
         Set one or more parameters for the next transactions or statements in
         the current session. See |SET TRANSACTION|_ for further details.