1 files changed, 11 insertions, 1 deletions
diff --git a/Doc/extending/extending.rst b/Doc/extending/extending.rst
index e78fe0c4b1..12868d3f74 100644
--- a/Doc/extending/extending.rst
+++ b/Doc/extending/extending.rst
@@ -370,11 +370,17 @@ optionally followed by an import of the module::
    int
    main(int argc, char *argv[])
    {
+       wchar_t *program = Py_DecodeLocale(argv[0], NULL);
+       if (program == NULL) {
+           fprintf(stderr, "Fatal error: cannot decode argv[0]\n");
+           exit(1);
+       }
+
        /* Add a built-in module, before Py_Initialize */
        PyImport_AppendInittab("spam", PyInit_spam);
 
        /* Pass argv[0] to the Python interpreter */
-       Py_SetProgramName(argv[0]);
+       Py_SetProgramName(program);
 
        /* Initialize the Python interpreter.  Required. */
        Py_Initialize();
@@ -386,6 +392,10 @@ optionally followed by an import of the module::
 
        ...
 
+       PyMem_RawFree(program);
+       return 0;
+   }
+
 .. note::
 
    Removing entries from ``sys.modules`` or importing compiled modules into