diff --git a/Objects/bytesobject.c b/Objects/bytesobject.c
index eeae0ff..7c1469c 100644
--- a/Objects/bytesobject.c
+++ b/Objects/bytesobject.c
@@ -3230,7 +3230,7 @@
 	if (!result)
 		return NULL;
 
-	buf = PyUnicode_AsString(result);
+	buf = _PyUnicode_AsString(result);
 	if (!buf) {
 		Py_DECREF(result);
 		return NULL;
diff --git a/Objects/codeobject.c b/Objects/codeobject.c
index cb8f3e4..01a637a 100644
--- a/Objects/codeobject.c
+++ b/Objects/codeobject.c
@@ -296,7 +296,7 @@
 	if (co->co_firstlineno != 0)
 		lineno = co->co_firstlineno;
 	if (co->co_filename && PyUnicode_Check(co->co_filename))
-		filename = PyUnicode_AsString(co->co_filename);
+		filename = _PyUnicode_AsString(co->co_filename);
 	return PyUnicode_FromFormat(
 	                "<code object %.100U at %p, file \"%.300s\", line %d>",
 	                co->co_name, co, filename, lineno);
diff --git a/Objects/exceptions.c b/Objects/exceptions.c
index 02a55c1..52869cb 100644
--- a/Objects/exceptions.c
+++ b/Objects/exceptions.c
@@ -943,7 +943,7 @@
        lineno here */
 
     if (self->filename && PyUnicode_Check(self->filename)) {
-	    filename = PyUnicode_AsString(self->filename);
+	    filename = _PyUnicode_AsString(self->filename);
     }
     have_lineno = (self->lineno != NULL) && PyLong_CheckExact(self->lineno);
 
diff --git a/Objects/floatobject.c b/Objects/floatobject.c
index efad212..4478168 100644
--- a/Objects/floatobject.c
+++ b/Objects/floatobject.c
@@ -1229,7 +1229,7 @@
 	 * exp+4*ndigits and exp-4*ndigits are within the range of a long.
 	 */
 
-	s = PyUnicode_AsStringAndSize(arg, &length);
+	s = _PyUnicode_AsStringAndSize(arg, &length);
 	if (s == NULL)
 		return NULL;
 	s_end = s + length;
@@ -1597,7 +1597,7 @@
 			     Py_TYPE(arg)->tp_name);
 		return NULL;
 	}
-	s = PyUnicode_AsString(arg);
+	s = _PyUnicode_AsString(arg);
 	if (s == NULL)
 		return NULL;
 	if (strcmp(s, "double") == 0) {
diff --git a/Objects/funcobject.c b/Objects/funcobject.c
index fddb120..594e524 100644
--- a/Objects/funcobject.c
+++ b/Objects/funcobject.c
@@ -297,7 +297,7 @@
 		PyErr_Format(PyExc_ValueError,
 			     "%s() requires a code object with %zd free vars,"
 			     " not %zd",
-			     PyUnicode_AsString(op->func_name),
+			     _PyUnicode_AsString(op->func_name),
 			     nclosure, nfree);
 		return -1;
 	}
diff --git a/Objects/moduleobject.c b/Objects/moduleobject.c
index 228ffee..ae01651 100644
--- a/Objects/moduleobject.c
+++ b/Objects/moduleobject.c
@@ -187,7 +187,7 @@
 		PyErr_SetString(PyExc_SystemError, "nameless module");
 		return NULL;
 	}
-	return PyUnicode_AsString(nameobj);
+	return _PyUnicode_AsString(nameobj);
 }
 
 const char *
@@ -207,7 +207,7 @@
 		PyErr_SetString(PyExc_SystemError, "module filename missing");
 		return NULL;
 	}
-	return PyUnicode_AsString(fileobj);
+	return _PyUnicode_AsString(fileobj);
 }
 
 PyModuleDef*
@@ -252,7 +252,7 @@
 	pos = 0;
 	while (PyDict_Next(d, &pos, &key, &value)) {
 		if (value != Py_None && PyUnicode_Check(key)) {
-			const char *s = PyUnicode_AsString(key);
+			const char *s = _PyUnicode_AsString(key);
 			if (s[0] == '_' && s[1] != '_') {
 				if (Py_VerboseFlag > 1)
 				    PySys_WriteStderr("#   clear[1] %s\n", s);
@@ -265,7 +265,7 @@
 	pos = 0;
 	while (PyDict_Next(d, &pos, &key, &value)) {
 		if (value != Py_None && PyUnicode_Check(key)) {
-			const char *s = PyUnicode_AsString(key);
+			const char *s = _PyUnicode_AsString(key);
 			if (s[0] != '_' || strcmp(s, "__builtins__") != 0) {
 				if (Py_VerboseFlag > 1)
 				    PySys_WriteStderr("#   clear[2] %s\n", s);
diff --git a/Objects/object.c b/Objects/object.c
index ff16994..79f8288 100644
--- a/Objects/object.c
+++ b/Objects/object.c
@@ -856,7 +856,7 @@
 	if (tp->tp_getattro != NULL)
 		return (*tp->tp_getattro)(v, name);
 	if (tp->tp_getattr != NULL)
-		return (*tp->tp_getattr)(v, PyUnicode_AsString(name));
+		return (*tp->tp_getattr)(v, _PyUnicode_AsString(name));
 	PyErr_Format(PyExc_AttributeError,
 		     "'%.50s' object has no attribute '%U'",
 		     tp->tp_name, name);
@@ -896,7 +896,7 @@
 		return err;
 	}
 	if (tp->tp_setattr != NULL) {
-		err = (*tp->tp_setattr)(v, PyUnicode_AsString(name), value);
+		err = (*tp->tp_setattr)(v, _PyUnicode_AsString(name), value);
 		Py_DECREF(name);
 		return err;
 	}
@@ -1062,7 +1062,7 @@
 
 	PyErr_Format(PyExc_AttributeError,
 		     "'%.50s' object has no attribute '%.400s'",
-		     tp->tp_name, PyUnicode_AsString(name));
+		     tp->tp_name, _PyUnicode_AsString(name));
   done:
 	Py_DECREF(name);
 	return res;
diff --git a/Objects/setobject.c b/Objects/setobject.c
index 771f47e..1054166 100644
--- a/Objects/setobject.c
+++ b/Objects/setobject.c
@@ -2390,7 +2390,7 @@
 	/* Exercise direct iteration */
 	i = 0, count = 0;
 	while (_PySet_NextEntry((PyObject *)dup, &i, &x, &hash)) {
-		s = PyUnicode_AsString(x);
+		s = _PyUnicode_AsString(x);
 		assert(s && (s[0] == 'a' || s[0] == 'b' || s[0] == 'c'));
 		count++;
 	}
diff --git a/Objects/structseq.c b/Objects/structseq.c
index 56e885c..091370c 100644
--- a/Objects/structseq.c
+++ b/Objects/structseq.c
@@ -270,7 +270,7 @@
 			Py_DECREF(tup);
 			return NULL;
 		}
-		crepr = PyUnicode_AsString(repr);
+		crepr = _PyUnicode_AsString(repr);
 		if (crepr == NULL) {
 			Py_DECREF(tup);
 			Py_DECREF(repr);
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index 9306552..616164e 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -258,7 +258,7 @@
 	}
 	Py_DECREF(tmp);
 
-	tp_name = PyUnicode_AsString(value);
+	tp_name = _PyUnicode_AsString(value);
 	if (tp_name == NULL)
 		return -1;
 
@@ -1255,7 +1255,7 @@
 				o = class_name(o);
 				PyErr_Format(PyExc_TypeError,
 					     "duplicate base class %.400s",
-					     o ? PyUnicode_AsString(o) : "?");
+					     o ? _PyUnicode_AsString(o) : "?");
 				Py_XDECREF(o);
 				return -1;
 			}
@@ -1301,7 +1301,7 @@
 	while (PyDict_Next(set, &i, &k, &v) && (size_t)off < sizeof(buf)) {
 		PyObject *name = class_name(k);
 		off += PyOS_snprintf(buf + off, sizeof(buf) - off, " %s",
-				     name ? PyUnicode_AsString(name) : "?");
+				     name ? _PyUnicode_AsString(name) : "?");
 		Py_XDECREF(name);
 		if (--n && (size_t)(off+1) < sizeof(buf)) {
 			buf[off++] = ',';
@@ -2094,7 +2094,7 @@
 	type->tp_as_sequence = &et->as_sequence;
 	type->tp_as_mapping = &et->as_mapping;
 	type->tp_as_buffer = &et->as_buffer;
-	type->tp_name = PyUnicode_AsString(name);
+	type->tp_name = _PyUnicode_AsString(name);
 	if (!type->tp_name) {
 		Py_DECREF(type);
 		return NULL;
@@ -2136,7 +2136,7 @@
 			char *doc_str;
 			char *tp_doc;
 
-			doc_str = PyUnicode_AsStringAndSize(doc, &len);
+			doc_str = _PyUnicode_AsStringAndSize(doc, &len);
 			if (doc_str == NULL) {
 				Py_DECREF(type);
 				return NULL;
@@ -2175,7 +2175,7 @@
 	slotoffset = base->tp_basicsize;
 	if (slots != NULL) {
 		for (i = 0; i < nslots; i++, mp++) {
-			mp->name = PyUnicode_AsString(
+			mp->name = _PyUnicode_AsString(
 				PyTuple_GET_ITEM(slots, i));
 			mp->type = T_OBJECT_EX;
 			mp->offset = slotoffset;
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 5925f80..5bf0fa2 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -1452,7 +1452,7 @@
 }
 
 char*
-PyUnicode_AsStringAndSize(PyObject *unicode, Py_ssize_t *psize)
+_PyUnicode_AsStringAndSize(PyObject *unicode, Py_ssize_t *psize)
 {
     PyObject *bytes;
     if (!PyUnicode_Check(unicode)) {
@@ -1468,9 +1468,9 @@
 }
 
 char*
-PyUnicode_AsString(PyObject *unicode)
+_PyUnicode_AsString(PyObject *unicode)
 {
-    return PyUnicode_AsStringAndSize(unicode, NULL);
+    return _PyUnicode_AsStringAndSize(unicode, NULL);
 }
 
 Py_UNICODE *PyUnicode_AsUnicode(PyObject *unicode)
diff --git a/Objects/weakrefobject.c b/Objects/weakrefobject.c
index 6ceed73..83e63fc 100644
--- a/Objects/weakrefobject.c
+++ b/Objects/weakrefobject.c
@@ -167,7 +167,7 @@
 	if (nameobj == NULL)
 		PyErr_Clear();
 	else if (PyUnicode_Check(nameobj))
-		name = PyUnicode_AsString(nameobj);
+		name = _PyUnicode_AsString(nameobj);
         PyOS_snprintf(buffer, sizeof(buffer),
 		      name ? "<weakref at %p; to '%.50s' at %p (%s)>"
 		           : "<weakref at %p; to '%.50s' at %p>",