diff --git a/Include/abstract.h b/Include/abstract.h
index d258ad5568756b..4bc9952ac6ee2e 100644
--- a/Include/abstract.h
+++ b/Include/abstract.h
@@ -409,8 +409,8 @@ xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx*/
 
 #ifndef Py_LIMITED_API
      PyAPI_FUNC(int) _PyObject_HasLen(PyObject *o);
+     PyAPI_FUNC(Py_ssize_t) PyObject_LengthHint(PyObject *o, Py_ssize_t);
 #endif
-PyAPI_FUNC(Py_ssize_t) PyObject_LengthHint(PyObject *o, Py_ssize_t);
 
        /*
      Guess the size of object o using len(o) or o.__length_hint__().
diff --git a/Include/codecs.h b/Include/codecs.h
index 5ca505fbd5ec04..8f0014e2377b40 100644
--- a/Include/codecs.h
+++ b/Include/codecs.h
@@ -94,7 +94,7 @@ PyAPI_FUNC(PyObject *) PyCodec_Decode(
        const char *errors
        );
 
-#ifndef PY_LIMITED_API
+#ifndef Py_LIMITED_API
 /* Text codec specific encoding and decoding API.
 
    Checks the encoding against a list of codecs which do not
diff --git a/Include/dictobject.h b/Include/dictobject.h
index 285966963c3e1b..ef122bde9733b9 100644
--- a/Include/dictobject.h
+++ b/Include/dictobject.h
@@ -53,8 +53,10 @@ PyAPI_FUNC(PyObject *) PyDict_GetItem(PyObject *mp, PyObject *key);
 PyAPI_FUNC(PyObject *) PyDict_GetItemWithError(PyObject *mp, PyObject *key);
 PyAPI_FUNC(PyObject *) _PyDict_GetItemIdWithError(PyObject *dp,
                                                   struct _Py_Identifier *key);
+#ifndef Py_LIMITED_API
 PyAPI_FUNC(PyObject *) PyDict_SetDefault(
     PyObject *mp, PyObject *key, PyObject *defaultobj);
+#endif
 PyAPI_FUNC(int) PyDict_SetItem(PyObject *mp, PyObject *key, PyObject *item);
 PyAPI_FUNC(int) PyDict_DelItem(PyObject *mp, PyObject *key);
 PyAPI_FUNC(void) PyDict_Clear(PyObject *mp);
diff --git a/Include/fileutils.h b/Include/fileutils.h
index 5466e3c7e0d713..e9bad80b8734cc 100644
--- a/Include/fileutils.h
+++ b/Include/fileutils.h
@@ -27,9 +27,11 @@ PyAPI_FUNC(int) _Py_stat(
     struct stat *statbuf);
 #endif
 
+#ifndef Py_LIMITED_API
 PyAPI_FUNC(int) _Py_open(
     const char *pathname,
     int flags);
+#endif
 
 PyAPI_FUNC(FILE *) _Py_wfopen(
     const wchar_t *path,
@@ -61,12 +63,14 @@ PyAPI_FUNC(wchar_t*) _Py_wgetcwd(
     wchar_t *buf,
     size_t size);
 
+#ifndef Py_LIMITED_API
 PyAPI_FUNC(int) _Py_get_inheritable(int fd);
 
 PyAPI_FUNC(int) _Py_set_inheritable(int fd, int inheritable,
                                     int *atomic_flag_works);
 
 PyAPI_FUNC(int) _Py_dup(int fd);
+#endif
 
 #ifdef __cplusplus
 }
diff --git a/Include/object.h b/Include/object.h
index f5396524c00f70..a27846543e021b 100644
--- a/Include/object.h
+++ b/Include/object.h
@@ -533,8 +533,10 @@ PyAPI_FUNC(int) PyObject_Not(PyObject *);
 PyAPI_FUNC(int) PyCallable_Check(PyObject *);
 
 PyAPI_FUNC(void) PyObject_ClearWeakRefs(PyObject *);
+#ifndef Py_LIMITED_API
 PyAPI_FUNC(void) PyObject_CallFinalizer(PyObject *);
 PyAPI_FUNC(int) PyObject_CallFinalizerFromDealloc(PyObject *);
+#endif
 
 /* Same as PyObject_Generic{Get,Set}Attr, but passing the attributes
    dict as the last parameter. */
diff --git a/Include/pyerrors.h b/Include/pyerrors.h
index ebc027fea38313..3e92bb68b05534 100644
--- a/Include/pyerrors.h
+++ b/Include/pyerrors.h
@@ -75,7 +75,9 @@ typedef PyOSErrorObject PyWindowsErrorObject;
 
 PyAPI_FUNC(void) PyErr_SetNone(PyObject *);
 PyAPI_FUNC(void) PyErr_SetObject(PyObject *, PyObject *);
+#ifndef Py_LIMITED_API
 PyAPI_FUNC(void) _PyErr_SetKeyError(PyObject *);
+#endif
 PyAPI_FUNC(void) PyErr_SetString(
     PyObject *exception,
     const char *string   /* decoded from utf-8 */
@@ -321,16 +323,20 @@ PyAPI_FUNC(void) PyErr_SyntaxLocationEx(
     const char *filename,       /* decoded from the filesystem encoding */
     int lineno,
     int col_offset);
+#ifndef Py_LIMITED_API
 PyAPI_FUNC(void) PyErr_SyntaxLocationObject(
     PyObject *filename,
     int lineno,
     int col_offset);
+#endif
 PyAPI_FUNC(PyObject *) PyErr_ProgramText(
     const char *filename,       /* decoded from the filesystem encoding */
     int lineno);
+#ifndef Py_LIMITED_API
 PyAPI_FUNC(PyObject *) PyErr_ProgramTextObject(
     PyObject *filename,
     int lineno);
+#endif
 
 /* The following functions are used to create and modify unicode
    exceptions from C */
diff --git a/Include/pyhash.h b/Include/pyhash.h
index 83c928137baffa..a7ca93758c3515 100644
--- a/Include/pyhash.h
+++ b/Include/pyhash.h
@@ -50,6 +50,7 @@ PyAPI_FUNC(Py_hash_t) _Py_HashBytes(const void*, Py_ssize_t);
  * (*) The siphash member may not be available on 32 bit platforms without
  *     an unsigned int64 data type.
  */
+#ifndef Py_LIMITED_API
 typedef union {
     /* ensure 24 bytes */
     unsigned char uc[24];
@@ -76,6 +77,7 @@ typedef union {
     } expat;
 } _Py_HashSecret_t;
 PyAPI_DATA(_Py_HashSecret_t) _Py_HashSecret;
+#endif
 
 #ifdef Py_DEBUG
 PyAPI_DATA(int) _Py_HashSecret_Initialized;
diff --git a/Include/pymem.h b/Include/pymem.h
index 83f1537f3f5512..2372b864a1d6da 100644
--- a/Include/pymem.h
+++ b/Include/pymem.h
@@ -11,9 +11,11 @@
 extern "C" {
 #endif
 
+#ifndef Py_LIMITED_API
 PyAPI_FUNC(void *) PyMem_RawMalloc(size_t size);
 PyAPI_FUNC(void *) PyMem_RawRealloc(void *ptr, size_t new_size);
 PyAPI_FUNC(void) PyMem_RawFree(void *ptr);
+#endif
 
 
 /* BEWARE:
@@ -58,8 +60,10 @@ PyAPI_FUNC(void *) PyMem_Malloc(size_t size);
 PyAPI_FUNC(void *) PyMem_Realloc(void *ptr, size_t new_size);
 PyAPI_FUNC(void) PyMem_Free(void *ptr);
 
+#ifndef Py_LIMITED_API
 PyAPI_FUNC(char *) _PyMem_RawStrdup(const char *str);
 PyAPI_FUNC(char *) _PyMem_Strdup(const char *str);
+#endif
 
 /* Macros. */
 
diff --git a/Include/pystate.h b/Include/pystate.h
index 06af808444372e..1f3465fdbd5236 100644
--- a/Include/pystate.h
+++ b/Include/pystate.h
@@ -236,7 +236,9 @@ PyAPI_FUNC(PyThreadState *) PyGILState_GetThisThreadState(void);
 /* Helper/diagnostic function - return 1 if the current thread
  * currently holds the GIL, 0 otherwise
  */
+#ifndef Py_LIMITED_API
 PyAPI_FUNC(int) PyGILState_Check(void);
+#endif
 
 #endif   /* #ifdef WITH_THREAD */
 
diff --git a/Include/pythonrun.h b/Include/pythonrun.h
index c364947685170f..2fc5578f04ba5a 100644
--- a/Include/pythonrun.h
+++ b/Include/pythonrun.h
@@ -155,10 +155,12 @@ PyAPI_FUNC(struct symtable *) Py_SymtableString(
     const char *str,
     const char *filename,       /* decoded from the filesystem encoding */
     int start);
+#ifndef Py_LIMITED_API
 PyAPI_FUNC(struct symtable *) Py_SymtableStringObject(
     const char *str,
     PyObject *filename,
     int start);
+#endif
 
 PyAPI_FUNC(void) PyErr_Print(void);
 PyAPI_FUNC(void) PyErr_PrintEx(int);
diff --git a/Include/sysmodule.h b/Include/sysmodule.h
index 925c2a34f47656..79e52a365f4738 100644
--- a/Include/sysmodule.h
+++ b/Include/sysmodule.h
@@ -8,7 +8,9 @@ extern "C" {
 #endif
 
 PyAPI_FUNC(PyObject *) PySys_GetObject(const char *);
+#ifndef Py_LIMITED_API
 PyAPI_FUNC(PyObject *) _PySys_GetObjectId(_Py_Identifier *key);
+#endif
 PyAPI_FUNC(int) PySys_SetObject(const char *, PyObject *);
 PyAPI_FUNC(int) _PySys_SetObjectId(_Py_Identifier *key, PyObject *);
 
diff --git a/Include/unicodeobject.h b/Include/unicodeobject.h
index b6d331bb8d3d75..c088a0f0c13fd9 100644
--- a/Include/unicodeobject.h
+++ b/Include/unicodeobject.h
@@ -2004,10 +2004,12 @@ PyAPI_FUNC(int) PyUnicode_Compare(
     PyObject *right             /* Right string */
     );
 
+#ifndef Py_LIMITED_API
 PyAPI_FUNC(int) _PyUnicode_CompareWithId(
     PyObject *left,             /* Left string */
     _Py_Identifier *right       /* Right identifier */
     );
+#endif
 
 PyAPI_FUNC(int) PyUnicode_CompareWithASCIIString(
     PyObject *left,
diff --git a/Include/warnings.h b/Include/warnings.h
index 217c06a6656711..effb9fad7196f4 100644
--- a/Include/warnings.h
+++ b/Include/warnings.h
@@ -17,6 +17,7 @@ PyAPI_FUNC(int) PyErr_WarnFormat(
     Py_ssize_t stack_level,
     const char *format,         /* ASCII-encoded string  */
     ...);
+#ifndef Py_LIMITED_API
 PyAPI_FUNC(int) PyErr_WarnExplicitObject(
     PyObject *category,
     PyObject *message,
@@ -24,6 +25,7 @@ PyAPI_FUNC(int) PyErr_WarnExplicitObject(
     int lineno,
     PyObject *module,
     PyObject *registry);
+#endif
 PyAPI_FUNC(int) PyErr_WarnExplicit(
     PyObject *category,
     const char *message,        /* UTF-8 encoded string */
@@ -32,11 +34,13 @@ PyAPI_FUNC(int) PyErr_WarnExplicit(
     const char *module,         /* UTF-8 encoded string */
     PyObject *registry);
 
+#ifndef Py_LIMITED_API
 PyAPI_FUNC(int)
 PyErr_WarnExplicitFormat(PyObject *category,
                          const char *filename, int lineno,
                          const char *module, PyObject *registry,
                          const char *format, ...);
+#endif
 
 /* DEPRECATED: Use PyErr_WarnEx() instead. */
 #ifndef Py_LIMITED_API
diff --git a/Misc/NEWS b/Misc/NEWS
index f766ed930b3941..13e75866d512ac 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,9 @@ Release date: 2014-01-05
 Core and Builtins
 -----------------
 
+- Issue #19526: Exclude all new API from the stable ABI. Exceptions can be
+  made if a need is demonstrated.
+
 - Issue #19969: PyBytes_FromFormatV() now raises an OverflowError if "%c"
   argument is not in range [0; 255].