diff --git a/Include/cpython/longintrepr.h b/Include/cpython/longintrepr.h
index fb82f83dc50e42..247e8e4a868c78 100644
--- a/Include/cpython/longintrepr.h
+++ b/Include/cpython/longintrepr.h
@@ -89,6 +89,8 @@ struct _longobject {
     _PyLongValue long_value;
 };
 
+PyAPI_FUNC(PyLongObject *) _PyLong_New(Py_ssize_t);
+
 
 /* Inline some internals for speed. These should be in pycore_long.h
  * if user code didn't need them inlined. */
diff --git a/Include/internal/pycore_long.h b/Include/internal/pycore_long.h
index ddf79ab1d130e8..ab45fc09b30445 100644
--- a/Include/internal/pycore_long.h
+++ b/Include/internal/pycore_long.h
@@ -47,8 +47,6 @@ extern "C" {
 # error "_PY_LONG_DEFAULT_MAX_STR_DIGITS smaller than threshold."
 #endif
 
-extern PyLongObject* _PyLong_New(Py_ssize_t);
-
 // Return a copy of src.
 extern PyObject* _PyLong_Copy(PyLongObject *src);