diff --git a/Doc/library/string.rst b/Doc/library/string.rst
index fa906f7..62e86d6 100644
--- a/Doc/library/string.rst
+++ b/Doc/library/string.rst
@@ -308,7 +308,7 @@
 
 The general form of a *standard format specifier* is:
 
-.. productionlist:: sf
+.. productionlist::
    format_spec: [[`fill`]`align`][`sign`][#][0][`width`][`grouping_option`][.`precision`][`type`]
    fill: <any character>
    align: "<" | ">" | "=" | "^"
diff --git a/Doc/reference/introduction.rst b/Doc/reference/introduction.rst
index bb7e390..62480bd 100644
--- a/Doc/reference/introduction.rst
+++ b/Doc/reference/introduction.rst
@@ -93,7 +93,7 @@
 The descriptions of lexical analysis and syntax use a modified BNF grammar
 notation.  This uses the following style of definition:
 
-.. productionlist:: *
+.. productionlist::
    name: `lc_letter` (`lc_letter` | "_")*
    lc_letter: "a"..."z"