diff --git a/extmod/modbluetooth.c b/extmod/modbluetooth.c
index 14d0921c84..64cd383525 100644
--- a/extmod/modbluetooth.c
+++ b/extmod/modbluetooth.c
@@ -384,27 +384,21 @@ STATIC mp_obj_t bluetooth_ble_config(size_t n_args, const mp_obj_t *args, mp_map
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_KW(bluetooth_ble_config_obj, 1, bluetooth_ble_config);
 
-STATIC mp_obj_t bluetooth_ble_irq(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
-    enum { ARG_handler };
-    static const mp_arg_t allowed_args[] = {
-        { MP_QSTR_handler, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_rom_obj = MP_ROM_NONE} },
-    };
-    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
-    mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
-    mp_obj_t callback = args[ARG_handler].u_obj;
-    if (callback != mp_const_none && !mp_obj_is_callable(callback)) {
-        mp_raise_ValueError(MP_ERROR_TEXT("invalid callback"));
+STATIC mp_obj_t bluetooth_ble_irq(mp_obj_t self_in, mp_obj_t handler_in) {
+    (void)self_in;
+    if (handler_in != mp_const_none && !mp_obj_is_callable(handler_in)) {
+        mp_raise_ValueError(MP_ERROR_TEXT("invalid handler"));
     }
 
     // Update the callback.
     MICROPY_PY_BLUETOOTH_ENTER
     mp_obj_bluetooth_ble_t *o = MP_OBJ_TO_PTR(MP_STATE_VM(bluetooth));
-    o->irq_handler = callback;
+    o->irq_handler = handler_in;
     MICROPY_PY_BLUETOOTH_EXIT
 
     return mp_const_none;
 }
-STATIC MP_DEFINE_CONST_FUN_OBJ_KW(bluetooth_ble_irq_obj, 1, bluetooth_ble_irq);
+STATIC MP_DEFINE_CONST_FUN_OBJ_2(bluetooth_ble_irq_obj, bluetooth_ble_irq);
 
 // ----------------------------------------------------------------------------
 // Bluetooth object: GAP