diff --git a/Include/structseq.h b/Include/structseq.h
index a5d7b2e..30c52ac 100644
--- a/Include/structseq.h
+++ b/Include/structseq.h
@@ -21,18 +21,25 @@
 
 extern char* PyStructSequence_UnnamedField;
 
+#ifndef Py_LIMITED_API
 PyAPI_FUNC(void) PyStructSequence_InitType(PyTypeObject *type,
                                            PyStructSequence_Desc *desc);
+#endif
+PyAPI_FUNC(PyTypeObject*) PyStructSequence_NewType(PyStructSequence_Desc *desc);
 
 PyAPI_FUNC(PyObject *) PyStructSequence_New(PyTypeObject* type);
 
+#ifndef Py_LIMITED_API
 typedef PyTupleObject PyStructSequence;
 
 /* Macro, *only* to be used to fill in brand new objects */
 #define PyStructSequence_SET_ITEM(op, i, v) PyTuple_SET_ITEM(op, i, v)
 
 #define PyStructSequence_GET_ITEM(op, i) PyTuple_GET_ITEM(op, i)
+#endif
 
+PyAPI_FUNC(void) PyStructSequence_SetItem(PyObject*, Py_ssize_t, PyObject*);
+PyAPI_FUNC(PyObject*) PyStructSequence_GetItem(PyObject*, Py_ssize_t);
 
 #ifdef __cplusplus
 }