diff --git a/README.rst b/README.rst
index 1ae225cc..83fa3da3 100644
--- a/README.rst
+++ b/README.rst
@@ -30,6 +30,9 @@ Features
   <http://cppformat.readthedocs.org/en/latest/syntax.html>`_
   similar to the one used by `str.format
   <http://docs.python.org/2/library/stdtypes.html#str.format>`_ in Python.
+* Safe `printf implementation
+  <http://cppformat.readthedocs.org/en/stable/reference.html#printf-formatting-functions>`_
+  including the POSIX extension for positional arguments.
 * Support for user-defined types.
 * High speed: performance of the format API is close to that of
   glibc's `printf <http://en.cppreference.com/w/cpp/io/c/fprintf>`_