diff --git a/Modules/_ctypes/stgdict.c b/Modules/_ctypes/stgdict.c
@@ -344,9 +344,7 @@ PyCStructUnionType_update_stgdict(PyObject *type, PyObject *fields, int isStruct
    int pack = 0;
    Py_ssize_t ffi_ofs;
    int big_endian;
-#if defined(X86_64)
    int arrays_seen = 0;
-#endif

    /* HACK Alert: I cannot be bothered to fix ctypes.com, so there has to
       be a way to use the old, broken sematics: _fields_ are not extended
@@ -471,10 +469,8 @@ PyCStructUnionType_update_stgdict(PyObject *type, PyObject *fields, int isStruct
            Py_XDECREF(pair);
            return -1;
        }
-#if defined(X86_64)
        if (PyCArrayTypeObject_Check(desc))
            arrays_seen = 1;
-#endif
        dict = PyType_stgdict(desc);
        if (dict == NULL) {
            Py_DECREF(pair);
@@ -615,8 +611,6 @@ PyCStructUnionType_update_stgdict(PyObject *type, PyObject *fields, int isStruct
    stgdict->align = total_align;
    stgdict->length = len;      /* ADD ffi_ofs? */

-#if defined(X86_64)
-
#define MAX_ELEMENTS 16

    if (arrays_seen && (size <= 16)) {
@@ -636,6 +630,10 @@ PyCStructUnionType_update_stgdict(PyObject *type, PyObject *fields, int isStruct
         * accurate set, to allow libffi to marshal them into registers
         * correctly. It means one more loop over the fields, but if we got
         * here, the structure is small, so there aren't too many of those.
         */
        ffi_type *actual_types[MAX_ELEMENTS + 1];
        int actual_type_index = 0;
@@ -713,7 +711,6 @@ PyCStructUnionType_update_stgdict(PyObject *type, PyObject *fields, int isStruct
        memcpy(&stgdict->ffi_type_pointer.elements[ffi_ofs], actual_types,
               actual_type_index * sizeof(ffi_type *));
    }
-#endif

    /* We did check that this flag was NOT set above, it must not
       have been set until now. */