diff --git a/src/ffi/structseq.rs b/src/ffi/structseq.rs
index d466bf96..b164ea2a 100644
--- a/src/ffi/structseq.rs
+++ b/src/ffi/structseq.rs
@@ -1,4 +1,5 @@
 use crate::ffi::object::{PyObject, PyTypeObject};
+#[cfg(not(PyPy))]
 use crate::ffi::pyport::Py_ssize_t;
 use std::os::raw::{c_char, c_int};
 
@@ -18,9 +19,48 @@ pub struct PyStructSequence_Desc {
     pub n_in_sequence: c_int,
 }
 
+// skipped PyStructSequence_UnnamedField;
+
 extern "C" {
+    #[cfg(not(Py_LIMITED_API))]
+    #[cfg_attr(PyPy, link_name = "PyPyStructSequence_InitType")]
+    pub fn PyStructSequence_InitType(_type: *mut PyTypeObject, desc: *mut PyStructSequence_Desc);
+
+    #[cfg(not(Py_LIMITED_API))]
+    #[cfg_attr(PyPy, link_name = "PyPyStructSequence_InitType2")]
+    pub fn PyStructSequence_InitType2(
+        _type: *mut PyTypeObject,
+        desc: *mut PyStructSequence_Desc,
+    ) -> c_int;
+
+    #[cfg(not(PyPy))]
+    #[cfg_attr(docsrs, doc(cfg(not(PyPy))))]
     pub fn PyStructSequence_NewType(desc: *mut PyStructSequence_Desc) -> *mut PyTypeObject;
+    #[cfg_attr(PyPy, link_name = "PyPyStructSequence_New")]
     pub fn PyStructSequence_New(_type: *mut PyTypeObject) -> *mut PyObject;
+}
+
+#[cfg(not(Py_LIMITED_API))]
+pub type PyStructSequence = crate::ffi::PyTupleObject;
+
+#[cfg(not(any(Py_LIMITED_API, PyPy)))]
+#[inline]
+pub unsafe fn PyStructSequence_SET_ITEM(op: *mut PyObject, i: Py_ssize_t, v: *mut PyObject) {
+    crate::ffi::PyTuple_SET_ITEM(op, i, v)
+}
+
+#[cfg(not(any(Py_LIMITED_API, PyPy)))]
+#[inline]
+pub unsafe fn PyStructSequence_GET_ITEM(op: *mut PyObject, i: Py_ssize_t) -> *mut PyObject {
+    crate::ffi::PyTuple_GET_ITEM(op, i)
+}
+
+extern "C" {
+    #[cfg(not(PyPy))]
+    #[cfg_attr(docsrs, doc(cfg(not(PyPy))))]
     pub fn PyStructSequence_SetItem(arg1: *mut PyObject, arg2: Py_ssize_t, arg3: *mut PyObject);
+
+    #[cfg(not(PyPy))]
+    #[cfg_attr(docsrs, doc(cfg(not(PyPy))))]
     pub fn PyStructSequence_GetItem(arg1: *mut PyObject, arg2: Py_ssize_t) -> *mut PyObject;
 }