diff --git a/Modules/pwdmodule.c b/Modules/pwdmodule.c
index 35a387a..b303f95 100644
--- a/Modules/pwdmodule.c
+++ b/Modules/pwdmodule.c
@@ -132,9 +132,7 @@
 
     if (!PyArg_ParseTuple(args, "U:getpwnam", &arg))
         return NULL;
-    if ((bytes = PyUnicode_AsEncodedString(arg,
-                                           Py_FileSystemDefaultEncoding,
-                                           "surrogateescape")) == NULL)
+    if ((bytes = PyUnicode_EncodeFSDefault(arg)) == NULL)
         return NULL;
     if (PyBytes_AsStringAndSize(bytes, &name, NULL) == -1)
         goto out;