diff --git a/Doc/reference/compound_stmts.rst b/Doc/reference/compound_stmts.rst
index 42fa864..bf53cb5 100644
--- a/Doc/reference/compound_stmts.rst
+++ b/Doc/reference/compound_stmts.rst
@@ -483,8 +483,10 @@
    decorators: `decorator`+
    decorator: "@" `dotted_name` ["(" [`argument_list` [","]] ")"] NEWLINE
    dotted_name: `identifier` ("." `identifier`)*
-   parameter_list: `defparameter` ("," `defparameter`)* ["," [`parameter_list_starargs`]]
-                 : | `parameter_list_starargs`
+   parameter_list: `defparameter` ("," `defparameter`)* ',' '/' [',' [`parameter_list_no_posonly`]]
+                 :   | `parameter_list_no_posonly`
+   parameter_list_no_posonly: `defparameter` ("," `defparameter`)* ["," [`parameter_list_starargs`]]
+                            : | `parameter_list_starargs`
    parameter_list_starargs: "*" [`parameter`] ("," `defparameter`)* ["," ["**" `parameter` [","]]]
                           : | "**" `parameter` [","]
    parameter: `identifier` [":" `expression`]