diff -r 470954641f3b Doc/c-api/sys.rst
--- a/Doc/c-api/sys.rst	Sun Jun 05 12:07:48 2016 +0000
+++ b/Doc/c-api/sys.rst	Sun Jun 05 11:01:05 2016 -0700
@@ -5,6 +5,9 @@
 Operating System Utilities
 ==========================
 
+.. c:function:: PyObject *PyOS_FSPath(PyObject *path)
+
+   Return the string representation of the path. Equivalent to :func:`os.fspath`.
 
 .. c:function:: int Py_FdIsInteractive(FILE *fp, const char *filename)