diff --git a/extmod/modlwip.c b/extmod/modlwip.c
index d76fd1b1e4..36516803fc 100644
--- a/extmod/modlwip.c
+++ b/extmod/modlwip.c
@@ -1500,7 +1500,7 @@ STATIC mp_obj_t lwip_print_pcbs() {
 }
 MP_DEFINE_CONST_FUN_OBJ_0(lwip_print_pcbs_obj, lwip_print_pcbs);
 
-#ifdef MICROPY_PY_LWIP
+#if MICROPY_PY_LWIP
 
 STATIC const mp_rom_map_elem_t mp_module_lwip_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_lwip) },