diff --git a/Include/cpython/optimizer.h b/Include/cpython/optimizer.h
index e3fe0e8f0ffd59..10457afc180a00 100644
--- a/Include/cpython/optimizer.h
+++ b/Include/cpython/optimizer.h
@@ -38,7 +38,7 @@ PyAPI_FUNC(void) PyUnstable_SetOptimizer(_PyOptimizerObject* optimizer);
 
 PyAPI_FUNC(_PyOptimizerObject *) PyUnstable_GetOptimizer(void);
 
-PyAPI_FUNC(_PyExecutorObject *)PyUnstable_GetExecutor(PyCodeObject *code, int offset);
+PyAPI_FUNC(_PyExecutorObject *) PyUnstable_GetExecutor(PyCodeObject *code, int offset);
 
 struct _PyInterpreterFrame *
 _PyOptimizer_BackEdge(struct _PyInterpreterFrame *frame, _Py_CODEUNIT *src, _Py_CODEUNIT *dest, PyObject **stack_pointer);
diff --git a/Include/cpython/sysmodule.h b/Include/cpython/sysmodule.h
index 19d9dddc344a4f..e028fb7ecd5230 100644
--- a/Include/cpython/sysmodule.h
+++ b/Include/cpython/sysmodule.h
@@ -2,11 +2,6 @@
 #  error "this header file must not be included directly"
 #endif
 
-PyAPI_FUNC(PyObject *) _PySys_GetAttr(PyThreadState *tstate,
-                                      PyObject *name);
-
-PyAPI_FUNC(size_t) _PySys_GetSizeOf(PyObject *);
-
 typedef int(*Py_AuditHookFunction)(const char *, PyObject *, void *);
 
 PyAPI_FUNC(int) PySys_Audit(
diff --git a/Include/internal/pycore_sysmodule.h b/Include/internal/pycore_sysmodule.h
index aec9c2060fd0c0..9b8eafd3d6cfd3 100644
--- a/Include/internal/pycore_sysmodule.h
+++ b/Include/internal/pycore_sysmodule.h
@@ -8,6 +8,12 @@ extern "C" {
 #  error "this header requires Py_BUILD_CORE define"
 #endif
 
+// Export for '_pickle' shared extension
+PyAPI_FUNC(PyObject*) _PySys_GetAttr(PyThreadState *tstate, PyObject *name);
+
+// Export for '_pickle' shared extension
+PyAPI_FUNC(size_t) _PySys_GetSizeOf(PyObject *);
+
 extern int _PySys_Audit(
     PyThreadState *tstate,
     const char *event,
diff --git a/Modules/_io/bytesio.c b/Modules/_io/bytesio.c
index 3ab503c9e3998d..f3074203f54ea2 100644
--- a/Modules/_io/bytesio.c
+++ b/Modules/_io/bytesio.c
@@ -1,5 +1,7 @@
 #include "Python.h"
 #include "pycore_object.h"
+#include "pycore_sysmodule.h"     // _PySys_GetSizeOf()
+
 #include <stddef.h>               // offsetof()
 #include "_iomodule.h"
 
diff --git a/Modules/_pickle.c b/Modules/_pickle.c
index 4f26ffe27d75f1..b97524856eeca8 100644
--- a/Modules/_pickle.c
+++ b/Modules/_pickle.c
@@ -17,10 +17,11 @@
 #include "pycore_pystate.h"       // _PyThreadState_GET()
 #include "pycore_runtime.h"       // _Py_ID()
 #include "pycore_setobject.h"     // _PySet_NextEntry()
-
+#include "pycore_sysmodule.h"     // _PySys_GetAttr()
 
 #include <stdlib.h>               // strtol()
 
+
 PyDoc_STRVAR(pickle_module_doc,
 "Optimized C implementation for the Python pickle module.");
 
diff --git a/Modules/_threadmodule.c b/Modules/_threadmodule.c
index 984747c44d7a57..ecb6998b71ba51 100644
--- a/Modules/_threadmodule.c
+++ b/Modules/_threadmodule.c
@@ -8,7 +8,9 @@
 #include "pycore_moduleobject.h"  // _PyModule_GetState()
 #include "pycore_pylifecycle.h"
 #include "pycore_pystate.h"       // _PyThreadState_SetCurrent()
+#include "pycore_sysmodule.h"     // _PySys_GetAttr()
 #include "pycore_weakref.h"       // _PyWeakref_GET_REF()
+
 #include <stddef.h>               // offsetof()
 
 
diff --git a/Modules/faulthandler.c b/Modules/faulthandler.c
index d8cfc13a7dc6d5..5ec34d4e99c80d 100644
--- a/Modules/faulthandler.c
+++ b/Modules/faulthandler.c
@@ -3,6 +3,7 @@
 #include "pycore_pyerrors.h"      // _Py_DumpExtensionModules
 #include "pycore_pystate.h"       // _PyThreadState_GET()
 #include "pycore_signal.h"        // Py_NSIG
+#include "pycore_sysmodule.h"     // _PySys_GetAttr()
 #include "pycore_traceback.h"     // _Py_DumpTracebackThreads
 
 #include <object.h>
diff --git a/Python/_warnings.c b/Python/_warnings.c
index 40ec5f613d5bf4..9e562d7ba7f6a7 100644
--- a/Python/_warnings.c
+++ b/Python/_warnings.c
@@ -7,6 +7,8 @@
 #include "pycore_pyerrors.h"
 #include "pycore_pylifecycle.h"   // _Py_IsInterpreterFinalizing()
 #include "pycore_pystate.h"       // _PyThreadState_GET()
+#include "pycore_sysmodule.h"     // _PySys_GetAttr()
+
 #include "clinic/_warnings.c.h"
 
 #define MODULE_NAME "_warnings"
diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 787f53fae354db..ac9bc72fe80d6c 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -12,6 +12,7 @@
 #include "pycore_object.h"        // _Py_AddToAllObjects()
 #include "pycore_pyerrors.h"      // _PyErr_NoMemory()
 #include "pycore_pystate.h"       // _PyThreadState_GET()
+#include "pycore_sysmodule.h"     // _PySys_GetAttr()
 #include "pycore_tuple.h"         // _PyTuple_FromArray()
 
 #include "clinic/bltinmodule.c.h"
diff --git a/Python/intrinsics.c b/Python/intrinsics.c
index 5267c10238e626..fefee0fc4ebbec 100644
--- a/Python/intrinsics.c
+++ b/Python/intrinsics.c
@@ -4,10 +4,11 @@
 #include "Python.h"
 #include "pycore_frame.h"
 #include "pycore_function.h"
-#include "pycore_runtime.h"
 #include "pycore_global_objects.h"
 #include "pycore_intrinsics.h"
 #include "pycore_pyerrors.h"
+#include "pycore_runtime.h"
+#include "pycore_sysmodule.h"     // _PySys_GetAttr()
 #include "pycore_typevarobject.h"
 
 
diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index 94d0f01f7477a7..0ec763c7aa7cf8 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -31,6 +31,7 @@ Data members:
 #include "pycore_pymem.h"         // _PyMem_SetDefaultAllocator()
 #include "pycore_pystate.h"       // _PyThreadState_GET()
 #include "pycore_structseq.h"     // _PyStructSequence_InitBuiltinWithFlags()
+#include "pycore_sysmodule.h"     // Define _PySys_GetSizeOf()
 #include "pycore_tuple.h"         // _PyTuple_FromArray()
 
 #include "frameobject.h"          // PyFrame_FastToLocalsWithError()
diff --git a/Python/traceback.c b/Python/traceback.c
index 61ace38275355c..657ddab1cbf615 100644
--- a/Python/traceback.c
+++ b/Python/traceback.c
@@ -13,6 +13,7 @@
 #include "pycore_pyarena.h"       // _PyArena_Free()
 #include "pycore_pyerrors.h"      // _PyErr_GetRaisedException()
 #include "pycore_pystate.h"       // _PyThreadState_GET()
+#include "pycore_sysmodule.h"     // _PySys_GetAttr()
 #include "pycore_traceback.h"     // EXCEPTION_TB_HEADER
 
 #include "../Parser/pegen.h"      // _PyPegen_byte_offset_to_character_offset()