diff --git a/py/objbool.c b/py/objbool.c
index e5bc3c2..b94c57f 100644
--- a/py/objbool.c
+++ b/py/objbool.c
@@ -63,7 +63,7 @@
     }
 }
 
-STATIC mp_obj_t bool_unary_op(mp_uint_t op, mp_obj_t o_in) {
+STATIC mp_obj_t bool_unary_op(mp_unary_op_t op, mp_obj_t o_in) {
     if (op == MP_UNARY_OP_LEN) {
         return MP_OBJ_NULL;
     }
@@ -71,7 +71,7 @@
     return mp_unary_op(op, MP_OBJ_NEW_SMALL_INT(self->value));
 }
 
-STATIC mp_obj_t bool_binary_op(mp_uint_t op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
+STATIC mp_obj_t bool_binary_op(mp_binary_op_t op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
     mp_obj_bool_t *self = MP_OBJ_TO_PTR(lhs_in);
     return mp_binary_op(op, MP_OBJ_NEW_SMALL_INT(self->value), rhs_in);
 }