diff --git a/Doc/reference/lexical_analysis.rst b/Doc/reference/lexical_analysis.rst
index 21449eb3732..e88c0ba8335 100644
--- a/Doc/reference/lexical_analysis.rst
+++ b/Doc/reference/lexical_analysis.rst
@@ -339,7 +339,9 @@ Keywords
 
 The following identifiers are used as reserved words, or *keywords* of the
 language, and cannot be used as ordinary identifiers.  They must be spelled
-exactly as written here::
+exactly as written here:
+
+.. sourcecode:: text
 
    and       del       from      not       while
    as        elif      global    or        with