diff --git a/bundles/pyml/pyml-current/py.ml b/bundles/pyml/pyml-current/py.ml
index fc49bc42f705384d7089d37158b104b4b897a959..d33dcf77f0bd8a0726ddb9c749c6af1a7d1da166 100644
--- a/bundles/pyml/pyml-current/py.ml
+++ b/bundles/pyml/pyml-current/py.ml
@@ -36,12 +36,6 @@ external pyerr_fetch_internal: unit -> pyobject * pyobject * pyobject
     = "PyErr_Fetch_wrapper"
 external pystring_asstringandsize: pyobject -> string option
     = "PyString_AsStringAndSize_wrapper"
-external pyobject_ascharbuffer: pyobject -> string option
-    = "PyObject_AsCharBuffer_wrapper"
-external pyobject_asreadbuffer: pyobject -> string option
-    = "PyObject_AsReadBuffer_wrapper"
-external pyobject_aswritebuffer: pyobject -> string option
-    = "PyObject_AsWriteBuffer_wrapper"
 external pylong_fromstring: string -> int -> pyobject * int
     = "PyLong_FromString_wrapper"
 external pycapsule_isvalid: Pytypes.pyobject -> string -> int
@@ -1429,12 +1423,6 @@ module Object = struct
 
   let to_string item = String.to_string (str item)
 
-  let as_char_buffer obj = check_some (pyobject_ascharbuffer obj)
-
-  let as_read_buffer obj = check_some (pyobject_asreadbuffer obj)
-
-  let as_write_buffer obj = check_some (pyobject_aswritebuffer obj)
-
   external reference_count: pyobject -> int = "pyrefcount"
 
   let repr_or_string repr v =
diff --git a/bundles/pyml/pyml-current/py.mli b/bundles/pyml/pyml-current/py.mli
index 19a4599ee1d46788fe526ef96c1fa5e2f2f71225..df509a0270053c26c18b6ab18165fb3aeb52b56f 100644
--- a/bundles/pyml/pyml-current/py.mli
+++ b/bundles/pyml/pyml-current/py.mli
@@ -239,18 +239,6 @@ module Object: sig
       We have
       [Py.Object.to_string o = Py.String.to_string (Py.Object.str o)]. *)
 
-  val as_char_buffer: t -> string
-  (** Wrapper for
-      {{:https://docs.python.org/3/c-api/objbuffer.html#c.PyObject_AsCharBuffer} PyObject_AsCharBuffer} *)
-
-  val as_read_buffer: t -> string
-  (** Wrapper for
-      {{:https://docs.python.org/3/c-api/objbuffer.html#c.PyObject_AsReadBuffer} PyObject_AsReadBuffer} *)
-
-  val as_write_buffer: t -> string
-  (** Wrapper for
-      {{:https://docs.python.org/3/c-api/objbuffer.html#c.PyObject_AsWriteBuffer} PyObject_AsWriteBuffer} *)
-
   val reference_count: t -> int
   (** [reference_count o] returns the number of references to the Python
       object [o]. *)
diff --git a/bundles/pyml/pyml-current/pycaml.ml b/bundles/pyml/pyml-current/pycaml.ml
index 8c93cf4a488301f445e2a4ee2e6abac2dd479974..13b16aa83a67ccdb63b54609ff4b49cec27fb88e 100644
--- a/bundles/pyml/pyml-current/pycaml.ml
+++ b/bundles/pyml/pyml-current/pycaml.ml
@@ -347,12 +347,6 @@ let pyunicode_asunicode = Py.String.to_unicode
 
 let pyunicode_getsize = Py.String.length
 
-let pyobject_ascharbuffer = Py.Object.as_char_buffer
-
-let pyobject_asreadbuffer = Py.Object.as_read_buffer
-
-let pyobject_aswritebuffer = Py.Object.as_write_buffer
-
 let python () =
   Py.Run.interactive ();
   0
diff --git a/bundles/pyml/pyml-current/pycaml.mli b/bundles/pyml/pyml-current/pycaml.mli
index 85b5f83c696332f5e272581dd8720268a4df2f89..da800baccd0772432883e1f3559e5bb94eaf686f 100644
--- a/bundles/pyml/pyml-current/pycaml.mli
+++ b/bundles/pyml/pyml-current/pycaml.mli
@@ -758,9 +758,6 @@ val pyobject_size : pyobject -> int
 val pyobject_getitem : pyobject * pyobject -> pyobject
 val pyobject_setitem : pyobject * pyobject * pyobject -> int
 val pyobject_delitem : pyobject * pyobject -> int
-val pyobject_ascharbuffer : pyobject -> string
-val pyobject_asreadbuffer : pyobject -> string
-val pyobject_aswritebuffer : pyobject -> string
 
 val pynumber_check : pyobject -> int
 val pynumber_add : pyobject * pyobject -> pyobject
diff --git a/bundles/pyml/pyml-current/pyml_stubs.c b/bundles/pyml/pyml-current/pyml_stubs.c
index 5158a0e4bd12e44fac2d372f77b2f23f2909cc14..cc10e8213e8be2ec8413a05c9144745d1a94b1db 100644
--- a/bundles/pyml/pyml-current/pyml_stubs.c
+++ b/bundles/pyml/pyml-current/pyml_stubs.c
@@ -195,12 +195,6 @@ static PyObject *Python__Py_FalseStruct;
 /* Buffer and size */
 static int (*Python_PyString_AsStringAndSize)
 (PyObject *, char **, Py_ssize_t *);
-static int (*Python_PyObject_AsCharBuffer)
-(PyObject *, const char **, Py_ssize_t *);
-static int (*Python_PyObject_AsReadBuffer)
-(PyObject *, const void **, Py_ssize_t *);
-static int (*Python_PyObject_AsWriteBuffer)
-(PyObject *, void **, Py_ssize_t *);
 
 /* Length argument */
 static PyObject *(*Python_PyLong_FromString)(const char *, const char **, int);
@@ -684,9 +678,6 @@ py_load_library(value filename_ocaml, value debug_build_ocaml)
         resolve("PyObject_CallMethodObjArgs");
     Python_PyErr_Fetch = resolve("PyErr_Fetch");
     Python_PyErr_NormalizeException = resolve("PyErr_NormalizeException");
-    Python_PyObject_AsCharBuffer = resolve("PyObject_AsCharBuffer");
-    Python_PyObject_AsReadBuffer = resolve("PyObject_AsReadBuffer");
-    Python_PyObject_AsWriteBuffer = resolve("PyObject_AsWriteBuffer");
     if (version_major >= 3) {
         Python__Py_FalseStruct = resolve("_Py_FalseStruct");
         Python_PyString_AsStringAndSize = resolve("PyBytes_AsStringAndSize");
@@ -1272,9 +1263,6 @@ pyml_wrap_ucs4_option_and_free(int32_t *buffer, bool free)
     }
 
 StringAndSize_wrapper(PyString_AsStringAndSize, char);
-StringAndSize_wrapper(PyObject_AsCharBuffer, const char);
-StringAndSize_wrapper(PyObject_AsReadBuffer, const void);
-StringAndSize_wrapper(PyObject_AsWriteBuffer, void);
 
 static FILE *
 open_file(value file, const char *mode)