diff --git a/Include/fileutils.h b/Include/fileutils.h
index cfcc40381fe..577ad88736e 100644
--- a/Include/fileutils.h
+++ b/Include/fileutils.h
@@ -15,14 +15,11 @@ PyAPI_FUNC(char*) Py_EncodeLocale(
     const wchar_t *text,
     size_t *error_pos);
 
-#if defined(HAVE_STAT) && !defined(MS_WINDOWS)
 PyAPI_FUNC(int) _Py_wstat(
     const wchar_t* path,
     struct stat *buf);
-#endif
 
 #ifndef Py_LIMITED_API
-#if defined(HAVE_FSTAT) || defined(MS_WINDOWS)
 
 #ifdef MS_WINDOWS
 struct _Py_stat_struct {
@@ -49,14 +46,11 @@ struct _Py_stat_struct {
 PyAPI_FUNC(int) _Py_fstat(
     int fd,
     struct _Py_stat_struct *stat);
-#endif   /* HAVE_FSTAT || MS_WINDOWS */
 #endif   /* Py_LIMITED_API */
 
-#ifdef HAVE_STAT
 PyAPI_FUNC(int) _Py_stat(
     PyObject *path,
     struct stat *statbuf);
-#endif   /* HAVE_STAT */
 
 #ifndef Py_LIMITED_API
 PyAPI_FUNC(int) _Py_open(
diff --git a/Include/pyport.h b/Include/pyport.h
index 69deb9f8bf7..e4b2cf00c18 100644
--- a/Include/pyport.h
+++ b/Include/pyport.h
@@ -357,28 +357,6 @@ typedef int Py_ssize_clean_t;
  * stat() and fstat() fiddling *
  *******************************/
 
-/* We expect that stat and fstat exist on most systems.
- *  It's confirmed on Unix, Mac and Windows.
- *  If you don't have them, add
- *      #define DONT_HAVE_STAT
- * and/or
- *      #define DONT_HAVE_FSTAT
- * to your pyconfig.h. Python code beyond this should check HAVE_STAT and
- * HAVE_FSTAT instead.
- * Also
- *      #define HAVE_SYS_STAT_H
- * if <sys/stat.h> exists on your platform, and
- *      #define HAVE_STAT_H
- * if <stat.h> does.
- */
-#ifndef DONT_HAVE_STAT
-#define HAVE_STAT
-#endif
-
-#ifndef DONT_HAVE_FSTAT
-#define HAVE_FSTAT
-#endif
-
 #ifdef HAVE_SYS_STAT_H
 #include <sys/stat.h>
 #elif defined(HAVE_STAT_H)
diff --git a/Misc/NEWS b/Misc/NEWS
index 34508e97a8f..5cc553718b8 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,9 @@ Release date: 2015-03-28
 Core and Builtins
 -----------------
 
+- Issue #23753: Python doesn't support anymore platforms without stat() or
+  fstat(), these functions are always required.
+
 - Issue #23681: The -b option now affects comparisons of bytes with int.
 
 - Issue #23632: Memoryviews now allow tuple indexing (including for
@@ -29,7 +32,7 @@ Library
 
 - Issue #23657: Avoid explicit checks for str in zipapp, adding support
   for pathlib.Path objects as arguments.
-  
+
 - Issue #23688: Added support of arbitrary bytes-like objects and avoided
   unnecessary copying of memoryview in gzip.GzipFile.write().
   Original patch by Wolfgang Maier.
diff --git a/Modules/_io/fileio.c b/Modules/_io/fileio.c
index 6152cde4648..b35a51b4e1a 100644
--- a/Modules/_io/fileio.c
+++ b/Modules/_io/fileio.c
@@ -180,7 +180,6 @@ fileio_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 static int
 check_fd(int fd)
 {
-#if defined(HAVE_FSTAT) || defined(MS_WINDOWS)
     struct _Py_stat_struct buf;
     if (_Py_fstat(fd, &buf) < 0 &&
 #ifdef MS_WINDOWS
@@ -197,7 +196,6 @@ check_fd(int fd)
         Py_XDECREF(exc);
         return -1;
     }
-#endif
     return 0;
 }
 
@@ -228,9 +226,7 @@ fileio_init(PyObject *oself, PyObject *args, PyObject *kwds)
 #elif !defined(MS_WINDOWS)
     int *atomic_flag_works = NULL;
 #endif
-#if defined(HAVE_FSTAT) || defined(MS_WINDOWS)
     struct _Py_stat_struct fdfstat;
-#endif
     int async_err = 0;
 
     assert(PyFileIO_Check(oself));
@@ -427,7 +423,6 @@ fileio_init(PyObject *oself, PyObject *args, PyObject *kwds)
     }
 
     self->blksize = DEFAULT_BUFFER_SIZE;
-#if defined(HAVE_FSTAT) || defined(MS_WINDOWS)
     if (_Py_fstat(self->fd, &fdfstat) < 0) {
         PyErr_SetFromErrno(PyExc_OSError);
         goto error;
@@ -446,7 +441,6 @@ fileio_init(PyObject *oself, PyObject *args, PyObject *kwds)
     if (fdfstat.st_blksize > 1)
         self->blksize = fdfstat.st_blksize;
 #endif /* HAVE_STRUCT_STAT_ST_BLKSIZE */
-#endif /* HAVE_FSTAT || MS_WINDOWS */
 
 #if defined(MS_WINDOWS) || defined(__CYGWIN__)
     /* don't translate newlines (\r\n <=> \n) */
@@ -597,8 +591,6 @@ fileio_readinto(fileio *self, PyObject *args)
     return PyLong_FromSsize_t(n);
 }
 
-#if defined(HAVE_FSTAT) || defined(MS_WINDOWS)
-
 static size_t
 new_buffersize(fileio *self, size_t currentsize)
 {
@@ -702,18 +694,6 @@ fileio_readall(fileio *self)
     return result;
 }
 
-#else
-
-static PyObject *
-fileio_readall(fileio *self)
-{
-    _Py_IDENTIFIER(readall);
-    return _PyObject_CallMethodId((PyObject*)&PyRawIOBase_Type,
-                                  &PyId_readall, "O", self);
-}
-
-#endif /* HAVE_FSTAT || MS_WINDOWS */
-
 static PyObject *
 fileio_read(fileio *self, PyObject *args)
 {
diff --git a/Modules/mmapmodule.c b/Modules/mmapmodule.c
index 63e93b730aa..25056a4aaa6 100644
--- a/Modules/mmapmodule.c
+++ b/Modules/mmapmodule.c
@@ -1112,9 +1112,7 @@ _GetMapSize(PyObject *o, const char* param)
 static PyObject *
 new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict)
 {
-#ifdef HAVE_FSTAT
     struct _Py_stat_struct st;
-#endif
     mmap_object *m_obj;
     PyObject *map_size_obj = NULL;
     Py_ssize_t map_size;
@@ -1179,7 +1177,6 @@ new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict)
     if (fd != -1)
         (void)fcntl(fd, F_FULLFSYNC);
 #endif
-#ifdef HAVE_FSTAT
     if (fd != -1 && _Py_fstat(fd, &st) == 0 && S_ISREG(st.st_mode)) {
         if (map_size == 0) {
             if (st.st_size == 0) {
@@ -1204,7 +1201,6 @@ new_mmap_object(PyTypeObject *type, PyObject *args, PyObject *kwdict)
             return NULL;
         }
     }
-#endif
     m_obj = (mmap_object *)type->tp_alloc(type, 0);
     if (m_obj == NULL) {return NULL;}
     m_obj->data = NULL;
diff --git a/Python/fileutils.c b/Python/fileutils.c
index e9c902b7f9b..63c25714923 100644
--- a/Python/fileutils.c
+++ b/Python/fileutils.c
@@ -519,17 +519,8 @@ Py_EncodeLocale(const wchar_t *text, size_t *error_pos)
 #endif   /* __APPLE__ */
 }
 
-/* In principle, this should use HAVE__WSTAT, and _wstat
-   should be detected by autoconf. However, no current
-   POSIX system provides that function, so testing for
-   it is pointless.
-   Not sure whether the MS_WINDOWS guards are necessary:
-   perhaps for cygwin/mingw builds?
-*/
-#if defined(HAVE_STAT) && !defined(MS_WINDOWS)
 
 /* Get file status. Encode the path to the locale encoding. */
-
 int
 _Py_wstat(const wchar_t* path, struct stat *buf)
 {
@@ -544,11 +535,8 @@ _Py_wstat(const wchar_t* path, struct stat *buf)
     PyMem_Free(fname);
     return err;
 }
-#endif
 
 
-#if defined(HAVE_FSTAT) || defined(MS_WINDOWS)
-
 #ifdef MS_WINDOWS
 static __int64 secs_between_epochs = 11644473600; /* Seconds between 1.1.1601 and 1.1.1970 */
 
@@ -679,10 +667,8 @@ _Py_fstat(int fd, struct _Py_stat_struct *result)
     return fstat(fd, result);
 #endif
 }
-#endif   /* HAVE_FSTAT || MS_WINDOWS */
 
 
-#ifdef HAVE_STAT
 /* Call _wstat() on Windows, or encode the path to the filesystem encoding and
    call stat() otherwise. Only fill st_mode attribute on Windows.
 
@@ -715,8 +701,6 @@ _Py_stat(PyObject *path, struct stat *statbuf)
 #endif
 }
 
-#endif   /* HAVE_STAT */
-
 
 static int
 get_inheritable(int fd, int raise)
diff --git a/Python/marshal.c b/Python/marshal.c
index 93d9d1d477f..3472882fb56 100644
--- a/Python/marshal.c
+++ b/Python/marshal.c
@@ -1481,7 +1481,6 @@ PyMarshal_ReadLongFromFile(FILE *fp)
     return res;
 }
 
-#if defined(HAVE_FSTAT) || defined(MS_WINDOWS)
 /* Return size of file in bytes; < 0 if unknown or INT_MAX if too big */
 static off_t
 getfilesize(FILE *fp)
@@ -1496,7 +1495,6 @@ getfilesize(FILE *fp)
     else
         return (off_t)st.st_size;
 }
-#endif
 
 /* If we can get the size of the file up-front, and it's reasonably small,
  * read it in one gulp and delegate to ...FromString() instead.  Much quicker
@@ -1509,7 +1507,6 @@ PyMarshal_ReadLastObjectFromFile(FILE *fp)
 {
 /* REASONABLE_FILE_LIMIT is by defn something big enough for Tkinter.pyc. */
 #define REASONABLE_FILE_LIMIT (1L << 18)
-#if defined(HAVE_FSTAT) || defined(MS_WINDOWS)
     off_t filesize;
     filesize = getfilesize(fp);
     if (filesize > 0 && filesize <= REASONABLE_FILE_LIMIT) {
@@ -1522,7 +1519,6 @@ PyMarshal_ReadLastObjectFromFile(FILE *fp)
         }
 
     }
-#endif
     /* We don't have fstat, or we do but the file is larger than
      * REASONABLE_FILE_LIMIT or malloc failed -- read a byte at a time.
      */