diff --git a/pep-0590.rst b/pep-0590.rst
index bc654f0c164..a1d299bc67d 100644
--- a/pep-0590.rst
+++ b/pep-0590.rst
@@ -131,8 +131,8 @@ The following functions or macros are added to the C API:
   Calls ``obj`` with the given arguments.
   Note that ``nargs`` may include the flag ``PY_VECTORCALL_ARGUMENTS_OFFSET``.
   The actual number of positional arguments is given by ``PyVectorcall_NARGS(nargs)``.
-  The argument ``keywords`` is a tuple of keyword names or ``NULL``.
-  An empty tuple has the same effect as passing ``NULL``.
+  The argument ``keywords`` is either a dict, a tuple of keyword names or ``NULL``.
+  An empty dict or empty tuple has the same effect as passing ``NULL``.
   This uses either the vectorcall protocol or ``tp_call`` internally;
   if neither is supported, an exception is raised.