diff --git a/Doc/howto/clinic.rst b/Doc/howto/clinic.rst
index 23be8a7a85c..5f4d3977bc1 100644
--- a/Doc/howto/clinic.rst
+++ b/Doc/howto/clinic.rst
@@ -1920,7 +1920,9 @@ Example from :source:`Objects/codeobject.c`::
        Return a copy of the code object with new values for the specified fields.
    [clinic start generated output]*/
 
-The generated docstring ends up looking like this::
+The generated docstring ends up looking like this:
+
+.. code-block:: none
 
    replace($self, /, **changes)
    --