diff --git a/Include/internal/pycore_import.h b/Include/internal/pycore_import.h
index c0db135a4e4..b1948df4fbf 100644
--- a/Include/internal/pycore_import.h
+++ b/Include/internal/pycore_import.h
@@ -36,7 +36,8 @@ extern PyObject *
 _PyImport_ResolveName(PyThreadState *tstate, PyObject *name, PyObject *globals, int level);
 extern PyObject *
 _PyImport_GetAbsName(PyThreadState *tstate, PyObject *name, PyObject *globals, int level);
-extern PyObject *
+// Symbol is exported for the JIT on Windows builds.
+PyAPI_FUNC(PyObject *)
 _PyImport_LoadLazyImportTstate(PyThreadState *tstate, PyObject *lazy_import);
 extern PyObject *
 _PyImport_LazyImportModuleLevelObject(PyThreadState *tstate, PyObject *name, PyObject *builtins, PyObject *globals,
diff --git a/Include/internal/pycore_lazyimportobject.h b/Include/internal/pycore_lazyimportobject.h
index 88dad3e7291..513daeffd91 100644
--- a/Include/internal/pycore_lazyimportobject.h
+++ b/Include/internal/pycore_lazyimportobject.h
@@ -2,12 +2,17 @@
 
 /* Lazy object interface */
 
-#ifndef Py_LAZYIMPORTOBJECT_H
-#define Py_LAZYIMPORTOBJECT_H
+#ifndef Py_INTERNAL_LAZYIMPORTOBJECT_H
+#define Py_INTERNAL_LAZYIMPORTOBJECT_H
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+#ifndef Py_BUILD_CORE
+#  error "this header requires Py_BUILD_CORE define"
+#endif
+
 PyAPI_DATA(PyTypeObject) PyLazyImport_Type;
 #define PyLazyImport_CheckExact(op) Py_IS_TYPE((op), &PyLazyImport_Type)
 
@@ -28,4 +33,4 @@ PyAPI_FUNC(PyObject *) _PyLazyImport_New(PyObject *import_func, PyObject *from,
 #ifdef __cplusplus
 }
 #endif
-#endif /* !Py_LAZYIMPORTOBJECT_H */
+#endif /* !Py_INTERNAL_LAZYIMPORTOBJECT_H */
diff --git a/Python/bytecodes.c b/Python/bytecodes.c
index e405a67625b..10b636844d8 100644
--- a/Python/bytecodes.c
+++ b/Python/bytecodes.c
@@ -11,12 +11,15 @@
 #include "pycore_audit.h"         // _PySys_Audit()
 #include "pycore_backoff.h"
 #include "pycore_cell.h"          // PyCell_GetRef()
+#include "pycore_ceval.h"         // _PyEval_LazyImportName(), _PyEval_LazyImportFrom()
 #include "pycore_code.h"
 #include "pycore_emscripten_signal.h"  // _Py_CHECK_EMSCRIPTEN_SIGNALS
 #include "pycore_function.h"
+#include "pycore_import.h"        // _PyImport_LoadLazyImportTstate()
 #include "pycore_instruments.h"
 #include "pycore_interpolation.h" // _PyInterpolation_Build()
 #include "pycore_intrinsics.h"
+#include "pycore_lazyimportobject.h"  // PyLazyImport_CheckExact()
 #include "pycore_long.h"          // _PyLong_ExactDealloc(), _PyLong_GetZero()
 #include "pycore_moduleobject.h"  // PyModuleObject
 #include "pycore_object.h"        // _PyObject_GC_TRACK()
@@ -2939,7 +2942,7 @@ dummy_func(
             b = res ? PyStackRef_True : PyStackRef_False;
         }
 
-         inst(IMPORT_NAME, (level, fromlist -- res)) {
+        inst(IMPORT_NAME, (level, fromlist -- res)) {
             PyObject *name = GETITEM(FRAME_CO_NAMES, oparg >> 2);
             PyObject *res_o;
             if (!(oparg & 0x02)) {
diff --git a/Python/jit.c b/Python/jit.c
index 47d3d7a5d27..18f4ad868f8 100644
--- a/Python/jit.c
+++ b/Python/jit.c
@@ -11,9 +11,11 @@
 #include "pycore_floatobject.h"
 #include "pycore_frame.h"
 #include "pycore_function.h"
+#include "pycore_import.h"
 #include "pycore_interpframe.h"
 #include "pycore_interpolation.h"
 #include "pycore_intrinsics.h"
+#include "pycore_lazyimportobject.h"
 #include "pycore_list.h"
 #include "pycore_long.h"
 #include "pycore_opcode_metadata.h"
diff --git a/Tools/jit/template.c b/Tools/jit/template.c
index 0167f1b0ae5..c2f17a89b44 100644
--- a/Tools/jit/template.c
+++ b/Tools/jit/template.c
@@ -12,9 +12,11 @@
 #include "pycore_frame.h"
 #include "pycore_function.h"
 #include "pycore_genobject.h"
+#include "pycore_import.h"
 #include "pycore_interpframe.h"
 #include "pycore_interpolation.h"
 #include "pycore_intrinsics.h"
+#include "pycore_lazyimportobject.h"
 #include "pycore_jit.h"
 #include "pycore_list.h"
 #include "pycore_long.h"