diff --git a/Doc/reference/lexical_analysis.rst b/Doc/reference/lexical_analysis.rst
index 3b53d2f..566e90b 100644
--- a/Doc/reference/lexical_analysis.rst
+++ b/Doc/reference/lexical_analysis.rst
@@ -587,7 +587,7 @@
 Integer literals are described by the following lexical definitions:
 
 .. productionlist::
-   integer: `decimalinteger` | `octinteger` | `hexinteger`
+   integer: `decimalinteger` | `octinteger` | `hexinteger` | `bininteger`
    decimalinteger: `nonzerodigit` `digit`* | "0"+
    nonzerodigit: "1"..."9"
    digit: "0"..."9"