diff --git a/py/objbool.c b/py/objbool.c
index 2dd019b..1dc5e57 100644
--- a/py/objbool.c
+++ b/py/objbool.c
@@ -29,7 +29,7 @@
     switch (n_args) {
         case 0: return mp_const_false;
         case 1: if (rt_is_true(args[0])) { return mp_const_true; } else { return mp_const_false; }
-        default: nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_TypeError, "bool takes at most 1 argument, %d given", n_args));
+        default: nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "bool takes at most 1 argument, %d given", n_args));
     }
 }
 
@@ -46,7 +46,7 @@
 }
 
 const mp_obj_type_t bool_type = {
-    { &mp_const_type },
+    { &mp_type_type },
     .name = MP_QSTR_bool,
     .print = bool_print,
     .make_new = bool_make_new,