diff --git a/py/objbool.c b/py/objbool.c
index 1d94ee03b..77394dab9 100644
--- a/py/objbool.c
+++ b/py/objbool.c
@@ -41,7 +41,7 @@ const mp_obj_type_t bool_type = {
     NULL, // binary_op
     NULL, // getiter
     NULL, // iternext
-    {{NULL, NULL},}, // method list
+    .methods = {{NULL, NULL},},
 };
 
 static const mp_obj_bool_t false_obj = {{&bool_type}, false};
diff --git a/py/objboundmeth.c b/py/objboundmeth.c
index 264c2effd..4e6d2e010 100644
--- a/py/objboundmeth.c
+++ b/py/objboundmeth.c
@@ -43,7 +43,7 @@ const mp_obj_type_t bound_meth_type = {
     NULL, // binary_op
     NULL, // getiter
     NULL, // iternext
-    {{NULL, NULL},}, // method list
+    .methods = {{NULL, NULL},},
 };
 
 mp_obj_t mp_obj_new_bound_meth(mp_obj_t self, mp_obj_t meth) {
diff --git a/py/objcell.c b/py/objcell.c
index daaa340a7..3465f9919 100644
--- a/py/objcell.c
+++ b/py/objcell.c
@@ -33,7 +33,7 @@ const mp_obj_type_t cell_type = {
     NULL, // binary_op
     NULL, // getiter
     NULL, // iternext
-    {{NULL, NULL},}, // method list
+    .methods = {{NULL, NULL},},
 };
 
 mp_obj_t mp_obj_new_cell(mp_obj_t obj) {
diff --git a/py/objclass.c b/py/objclass.c
index 197dfa726..536abdf7e 100644
--- a/py/objclass.c
+++ b/py/objclass.c
@@ -70,7 +70,7 @@ const mp_obj_type_t class_type = {
     NULL, // binary_op
     NULL, // getiter
     NULL, // iternext
-    {{NULL, NULL},}, // method list
+    .methods = {{NULL, NULL},},
 };
 
 mp_obj_t mp_obj_new_class(mp_map_t *class_locals) {
diff --git a/py/objclosure.c b/py/objclosure.c
index 550bb5067..3317eb86f 100644
--- a/py/objclosure.c
+++ b/py/objclosure.c
@@ -42,7 +42,7 @@ const mp_obj_type_t closure_type = {
     NULL, // binary_op
     NULL, // getiter
     NULL, // iternext
-    {{NULL, NULL},}, // method list
+    .methods = {{NULL, NULL},},
 };
 
 mp_obj_t mp_obj_new_closure(mp_obj_t fun, mp_obj_t closure_tuple) {
diff --git a/py/objcomplex.c b/py/objcomplex.c
index 5408d71cf..fc32f9667 100644
--- a/py/objcomplex.c
+++ b/py/objcomplex.c
@@ -125,7 +125,7 @@ const mp_obj_type_t complex_type = {
     complex_binary_op, // binary_op
     NULL, // getiter
     NULL, // iternext
-    { { NULL, NULL }, }, // method list
+    .methods = { { NULL, NULL }, },
 };
 
 mp_obj_t mp_obj_new_complex(mp_float_t real, mp_float_t imag) {
diff --git a/py/objdict.c b/py/objdict.c
index 3737f5eab..b3e21aedd 100644
--- a/py/objdict.c
+++ b/py/objdict.c
@@ -63,14 +63,11 @@ static mp_obj_t dict_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
 const mp_obj_type_t dict_type = {
     { &mp_const_type },
     "dict",
-    dict_print, // print
-    dict_make_new, // make_new
-    NULL, // call_n
-    NULL, // unary_op
-    dict_binary_op, // binary_op
-    NULL, // getiter
-    NULL, // iternext
-    {{NULL, NULL},}, // method list
+    .print = dict_print,
+    .make_new = dict_make_new,
+    .binary_op = dict_binary_op,
+    .getiter = NULL,
+    .methods = {{NULL, NULL},},
 };
 
 mp_obj_t mp_obj_new_dict(int n_args) {
diff --git a/py/objexcept.c b/py/objexcept.c
index ec03b9bf1..22b8c5812 100644
--- a/py/objexcept.c
+++ b/py/objexcept.c
@@ -45,7 +45,7 @@ const mp_obj_type_t exception_type = {
     NULL, // binary_op
     NULL, // getiter
     NULL, // iternext
-    {{NULL, NULL},}, // method list
+    .methods = {{NULL, NULL},},
 };
 
 mp_obj_t mp_obj_new_exception(qstr id) {
diff --git a/py/objfloat.c b/py/objfloat.c
index 8fc925e0b..0250172ad 100644
--- a/py/objfloat.c
+++ b/py/objfloat.c
@@ -79,14 +79,11 @@ static mp_obj_t float_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
 const mp_obj_type_t float_type = {
     { &mp_const_type },
     "float",
-    float_print,
-    float_make_new, // make_new
-    NULL, // call_n
-    float_unary_op,
-    float_binary_op,
-    NULL, // getiter
-    NULL, // iternext
-    { { NULL, NULL }, }, // method list
+    .print = float_print,
+    .make_new = float_make_new,
+    .unary_op = float_unary_op,
+    .binary_op = float_binary_op,
+    .methods = { { NULL, NULL }, },
 };
 
 mp_obj_t mp_obj_new_float(mp_float_t value) {
diff --git a/py/objfun.c b/py/objfun.c
index 22b82a9ca..2d81f8f5c 100644
--- a/py/objfun.c
+++ b/py/objfun.c
@@ -76,7 +76,7 @@ const mp_obj_type_t fun_native_type = {
     NULL, // binary_op
     NULL, // getiter
     NULL, // iternext
-    { // method list
+    .methods = {
         {NULL, NULL}, // end-of-list sentinel
     },
 };
@@ -169,7 +169,7 @@ const mp_obj_type_t fun_bc_type = {
     NULL, // binary_op
     NULL, // getiter
     NULL, // iternext
-    { // method list
+    .methods = {
         {NULL, NULL}, // end-of-list sentinel
     },
 };
@@ -283,7 +283,7 @@ static const mp_obj_type_t fun_asm_type = {
     NULL, // binary_op
     NULL, // getiter
     NULL, // iternext
-    { // method list
+    .methods = {
         {NULL, NULL}, // end-of-list sentinel
     },
 };
diff --git a/py/objgenerator.c b/py/objgenerator.c
index 7fbca075e..a91b0d6fc 100644
--- a/py/objgenerator.c
+++ b/py/objgenerator.c
@@ -46,7 +46,7 @@ const mp_obj_type_t gen_wrap_type = {
     NULL, // binary_op
     NULL, // getiter
     NULL, // iternext
-    {{NULL, NULL},}, // method list
+    .methods = {{NULL, NULL},},
 };
 
 mp_obj_t mp_obj_new_gen_wrap(uint n_locals, uint n_stack, mp_obj_t fun) {
@@ -101,7 +101,7 @@ const mp_obj_type_t gen_instance_type = {
     NULL, // binary_op
     gen_instance_getiter, // getiter
     gen_instance_iternext, // iternext
-    {{NULL, NULL},}, // method list
+    .methods = {{NULL, NULL},},
 };
 
 // args are in reverse order in the array
diff --git a/py/objinstance.c b/py/objinstance.c
index fd8cada7c..8ef2773fd 100644
--- a/py/objinstance.c
+++ b/py/objinstance.c
@@ -99,7 +99,7 @@ const mp_obj_type_t instance_type = {
     NULL, // binary_op
     NULL, // getiter
     NULL, // iternext
-    {{NULL, NULL},}, // method list
+    .methods = {{NULL, NULL},},
 };
 
 mp_obj_t mp_obj_new_instance(mp_obj_t class) {
diff --git a/py/objint.c b/py/objint.c
index 5bc747e8f..8d69c4e7a 100644
--- a/py/objint.c
+++ b/py/objint.c
@@ -33,14 +33,8 @@ static mp_obj_t int_make_new(mp_obj_t type_in, int n_args, const mp_obj_t *args)
 const mp_obj_type_t int_type = {
     { &mp_const_type },
     "int",
-    NULL,
-    int_make_new, // make_new
-    NULL, // call_n
-    NULL, // unary_op
-    NULL, // binary_op
-    NULL, // getiter
-    NULL, // iternext
-    { { NULL, NULL }, }, // method list
+    .make_new = int_make_new,
+    .methods = { { NULL, NULL }, },
 };
 
 mp_obj_t mp_obj_new_int(machine_int_t value) {
diff --git a/py/objlist.c b/py/objlist.c
index 6c0de405f..a656a4aeb 100644
--- a/py/objlist.c
+++ b/py/objlist.c
@@ -208,14 +208,12 @@ static MP_DEFINE_CONST_FUN_OBJ_2(list_sort_obj, list_sort);
 const mp_obj_type_t list_type = {
     { &mp_const_type },
     "list",
-    list_print, // print
-    list_make_new, // make_new
-    NULL, // call_n
-    NULL, // unary_op
-    list_binary_op, // binary_op
-    list_getiter, // getiter
-    NULL, // iternext
-    { // method list
+    .print = list_print,
+    .make_new = list_make_new,
+    .unary_op = NULL,
+    .binary_op = list_binary_op,
+    .getiter = list_getiter,
+    .methods = {
         { "append", &list_append_obj },
         { "clear", &list_clear_obj },
         { "copy", &list_copy_obj },
@@ -287,14 +285,8 @@ mp_obj_t list_it_iternext(mp_obj_t self_in) {
 static const mp_obj_type_t list_it_type = {
     { &mp_const_type },
     "list_iterator",
-    NULL, // print
-    NULL, // make_new
-    NULL, // call_n
-    NULL, // unary_op
-    NULL, // binary_op
-    NULL, // getiter
-    list_it_iternext, // iternext
-    { { NULL, NULL }, }, // method list
+    .iternext = list_it_iternext,
+    .methods = { { NULL, NULL }, },
 };
 
 mp_obj_t mp_obj_new_list_iterator(mp_obj_list_t *list, int cur) {
diff --git a/py/objmodule.c b/py/objmodule.c
index 9263eb44f..2d6f9555e 100644
--- a/py/objmodule.c
+++ b/py/objmodule.c
@@ -31,7 +31,7 @@ const mp_obj_type_t module_type = {
     NULL, // binary_op
     NULL, // getiter
     NULL, // iternext
-    {{NULL, NULL},}, // method list
+    .methods = {{NULL, NULL},},
 };
 
 mp_obj_t mp_obj_new_module(qstr module_name) {
diff --git a/py/objnone.c b/py/objnone.c
index 11dd4939b..877e61fe5 100644
--- a/py/objnone.c
+++ b/py/objnone.c
@@ -17,14 +17,8 @@ void none_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_ob
 const mp_obj_type_t none_type = {
     { &mp_const_type },
     "NoneType",
-    none_print, // print
-    NULL, // make_new
-    NULL, // call_n
-    NULL, // unary_op
-    NULL, // binary_op
-    NULL, // getiter
-    NULL, // iternext
-    {{NULL, NULL},}, // method list
+    .print = none_print,
+    .methods = {{NULL, NULL},},
 };
 
 static const mp_obj_none_t none_obj = {{&none_type}};
diff --git a/py/objrange.c b/py/objrange.c
index b163f779b..1ef42673f 100644
--- a/py/objrange.c
+++ b/py/objrange.c
@@ -32,7 +32,7 @@ static const mp_obj_type_t range_type = {
     NULL, // binary_op
     range_getiter,
     NULL, // iternext
-    {{NULL, NULL},}, // method list
+    .methods = {{NULL, NULL},},
 };
 
 // range is a class and instances are immutable sequence objects
@@ -77,7 +77,7 @@ static const mp_obj_type_t range_it_type = {
     NULL, // binary_op
     NULL, // getiter
     range_it_iternext,
-    {{NULL, NULL},}, // method list
+    .methods = {{NULL, NULL},},
 };
 
 mp_obj_t mp_obj_new_range_iterator(int cur, int stop, int step) {
diff --git a/py/objset.c b/py/objset.c
index 826f8bdc8..dd9a4d1e1 100644
--- a/py/objset.c
+++ b/py/objset.c
@@ -64,7 +64,7 @@ const mp_obj_type_t set_type = {
     NULL, // binary_op
     NULL, // getiter
     NULL, // iternext
-    { { NULL, NULL }, }, // method list
+    .methods = { { NULL, NULL }, },
 };
 
 mp_obj_t mp_obj_new_set(int n_args, mp_obj_t *items) {
diff --git a/py/objslice.c b/py/objslice.c
index a624be963..da69b92af 100644
--- a/py/objslice.c
+++ b/py/objslice.c
@@ -30,7 +30,7 @@ const mp_obj_type_t ellipsis_type = {
     NULL, // binary_op
     NULL, // getiter
     NULL, // iternext
-    {{NULL, NULL},}, // method list
+    .methods = {{NULL, NULL},},
 };
 
 static const mp_obj_ellipsis_t ellipsis_obj = {{&ellipsis_type}};
@@ -57,14 +57,8 @@ void slice_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_o
 const mp_obj_type_t slice_type = {
     { &mp_const_type },
     "slice",
-    slice_print,
-    NULL, // call_n
-    NULL, // make_new
-    NULL, // unary_op
-    NULL, // binary_op
-    NULL, // getiter
-    NULL, // iternext
-    { { NULL, NULL }, }, // method list
+    .print = slice_print,
+    .methods = { { NULL, NULL }, },
 };
 
 // TODO: Make sure to handle "empty" values, which are signified by None in CPython
diff --git a/py/objstr.c b/py/objstr.c
index a1d139e83..db3e0beca 100644
--- a/py/objstr.c
+++ b/py/objstr.c
@@ -187,14 +187,10 @@ static MP_DEFINE_CONST_FUN_OBJ_VAR(str_format_obj, 1, str_format);
 const mp_obj_type_t str_type = {
     { &mp_const_type },
     "str",
-    str_print, // print
-    NULL, // make_new
-    NULL, // call_n
-    NULL, // unary_op
-    str_binary_op, // binary_op
-    str_getiter, // getiter
-    NULL, // iternext
-    { // method list
+    .print = str_print,
+    .binary_op = str_binary_op,
+    .getiter = str_getiter,
+    .methods = {
         { "join", &str_join_obj },
         { "format", &str_format_obj },
         { NULL, NULL }, // end-of-list sentinel
@@ -238,14 +234,8 @@ mp_obj_t str_it_iternext(mp_obj_t self_in) {
 static const mp_obj_type_t str_it_type = {
     { &mp_const_type },
     "str_iterator",
-    NULL, // print
-    NULL, // make_new
-    NULL, // call_n
-    NULL, // unary_op
-    NULL, // binary_op
-    NULL, // getiter
-    str_it_iternext, // iternext
-    { { NULL, NULL }, }, // method str
+    .iternext = str_it_iternext,
+    .methods = { { NULL, NULL }, },
 };
 
 mp_obj_t mp_obj_new_str_iterator(mp_obj_str_t *str, int cur) {
diff --git a/py/objtuple.c b/py/objtuple.c
index d55259d1a..ceca4200e 100644
--- a/py/objtuple.c
+++ b/py/objtuple.c
@@ -99,14 +99,11 @@ static mp_obj_t tuple_getiter(mp_obj_t o_in) {
 const mp_obj_type_t tuple_type = {
     { &mp_const_type },
     "tuple",
-    tuple_print, // print
-    tuple_make_new, // make_new
-    NULL, // call_n
-    NULL, // unary_op
-    tuple_binary_op, // binary_op
-    tuple_getiter, // getiter
-    NULL, // iternext
-    {{NULL, NULL},}, // method list
+    .print = tuple_print,
+    .make_new = tuple_make_new,
+    .binary_op = tuple_binary_op,
+    .getiter = tuple_getiter,
+    .methods = {{NULL, NULL},},
 };
 
 // the zero-length tuple
@@ -168,14 +165,8 @@ static mp_obj_t tuple_it_iternext(mp_obj_t self_in) {
 static const mp_obj_type_t tuple_it_type = {
     { &mp_const_type },
     "tuple_iterator",
-    NULL, // print
-    NULL, // make_new
-    NULL, // call_n
-    NULL, // unary_op
-    NULL, // binary_op
-    NULL, // getiter
-    tuple_it_iternext,
-    {{NULL, NULL},}, // method list
+    .iternext = tuple_it_iternext,
+    .methods = {{NULL, NULL},},
 };
 
 static mp_obj_t mp_obj_new_tuple_iterator(mp_obj_tuple_t *tuple, int cur) {
diff --git a/py/objtype.c b/py/objtype.c
index aeeaebb95..37d40b38f 100644
--- a/py/objtype.c
+++ b/py/objtype.c
@@ -25,12 +25,7 @@ static mp_obj_t type_call_n(mp_obj_t self_in, int n_args, const mp_obj_t *args)
 const mp_obj_type_t mp_const_type = {
     { &mp_const_type },
     "type",
-    type_print, // print
-    NULL, // make_new
-    type_call_n, // call_n
-    NULL, // unary_op
-    NULL, // binary_op
-    NULL, // getiter
-    NULL, // iternext
-    {{NULL, NULL},}, // method list
+    .print = type_print,
+    .call_n = type_call_n,
+    .methods = {{NULL, NULL},},
 };
diff --git a/stm/i2c.c b/stm/i2c.c
index 3f29f02c0..9e25ff983 100644
--- a/stm/i2c.c
+++ b/stm/i2c.c
@@ -329,14 +329,8 @@ static MP_DEFINE_CONST_FUN_OBJ_1(i2c_obj_stop_obj, i2c_obj_stop);
 static const mp_obj_type_t i2c_obj_type = {
     { &mp_const_type },
     "I2C",
-    i2c_obj_print, // print
-    NULL, // make_new
-    NULL, // call_n
-    NULL, // unary_op
-    NULL, // binary_op
-    NULL, // getiter
-    NULL, // iternext
-    { // method list
+    .print = i2c_obj_print,
+    .methods = {
         { "start", &i2c_obj_start_obj },
         { "write", &i2c_obj_write_obj },
         { "read", &i2c_obj_read_obj },
diff --git a/stm/led.c b/stm/led.c
index 9305716be..ef6fea0ce 100644
--- a/stm/led.c
+++ b/stm/led.c
@@ -107,14 +107,8 @@ static MP_DEFINE_CONST_FUN_OBJ_1(led_obj_off_obj, led_obj_off);
 static const mp_obj_type_t led_obj_type = {
     { &mp_const_type },
     "Led",
-    led_obj_print, // print
-    NULL, // make_new
-    NULL, // call_n
-    NULL, // unary_op
-    NULL, // binary_op
-    NULL, // getiter
-    NULL, // iternext
-    { // method list
+    .print = led_obj_print,
+    .methods = {
         { "on", &led_obj_on_obj },
         { "off", &led_obj_off_obj },
         { NULL, NULL },
diff --git a/stm/main.c b/stm/main.c
index 2121742fd..07c974eff 100644
--- a/stm/main.c
+++ b/stm/main.c
@@ -699,7 +699,7 @@ static const mp_obj_type_t file_obj_type = {
     NULL, // binary_op
     NULL, // getiter
     NULL, // iternext
-    { // method list
+    .methods = {
         { "read", &file_obj_read_obj },
         { "write", &file_obj_write_obj },
         { "close", &file_obj_close_obj },
diff --git a/stm/servo.c b/stm/servo.c
index 1e31db514..31190ce79 100644
--- a/stm/servo.c
+++ b/stm/servo.c
@@ -140,14 +140,8 @@ static MP_DEFINE_CONST_FUN_OBJ_2(servo_obj_angle_obj, servo_obj_angle);
 static const mp_obj_type_t servo_obj_type = {
     { &mp_const_type },
     "Servo",
-    servo_obj_print, // print
-    NULL, // make_new
-    NULL, // call_n
-    NULL, // unary_op
-    NULL, // binary_op
-    NULL, // getiter
-    NULL, // iternext
-    { // method list
+    .print = servo_obj_print,
+    .methods = {
         { "angle", &servo_obj_angle_obj },
         { NULL, NULL },
     }
diff --git a/unix/main.c b/unix/main.c
index 16fcf6ef8..a06dc3679 100644
--- a/unix/main.c
+++ b/unix/main.c
@@ -191,14 +191,14 @@ static MP_DEFINE_CONST_FUN_OBJ_2(test_set_obj, test_set);
 static const mp_obj_type_t test_type = {
     { &mp_const_type },
     "Test",
-    test_print, // print
-    NULL, // make_new
-    NULL, // call_n
-    NULL, // unary_op
-    NULL, // binary_op
-    NULL, // getiter
-    NULL, // iternext
-    { // method list
+    .print = test_print,
+    .make_new = NULL,
+    .call_n = NULL,
+    .unary_op = NULL,
+    .binary_op = NULL,
+    .getiter = NULL,
+    .iternext = NULL,
+    .methods = {
         { "get", &test_get_obj },
         { "set", &test_set_obj },
         { NULL, NULL },