diff --git a/doc/src/Python_ext.rst b/doc/src/Python_ext.rst
index 30782c9464..40f6e10609 100644
--- a/doc/src/Python_ext.rst
+++ b/doc/src/Python_ext.rst
@@ -2,14 +2,14 @@ Extending the library and Python interface
 ******************************************
 
 As noted above, these Python class methods correspond one-to-one with
-the functions in the LAMMPS library interface in src/library.cpp and
-library.h.  This means you can extend the Python wrapper via the
+the functions in the LAMMPS library interface in ``src/library.cpp`` and
+``library.h``.  This means you can extend the Python wrapper via the
 following steps:
 
-* Add a new interface function to src/library.cpp and
-  src/library.h.
+* Add a new interface function to ``src/library.cpp`` and
+  ``src/library.h``.
 * Rebuild LAMMPS as a shared library.
-* Add a wrapper method to python/lammps.py for this interface
+* Add a wrapper method to ``python/lammps.py`` for this interface
   function.
 * You should now be able to invoke the new interface function from a
   Python script.