diff --git a/py/builtintables.c b/py/builtintables.c
index 839d5ba81..ac9eed8d4 100644
--- a/py/builtintables.c
+++ b/py/builtintables.c
@@ -25,7 +25,7 @@ STATIC const mp_builtin_elem_t builtin_object_table[] = {
     { MP_QSTR___repl_print__, (mp_obj_t)&mp_builtin___repl_print___obj },
 
     // built-in types
-    { MP_QSTR_bool, (mp_obj_t)&bool_type },
+    { MP_QSTR_bool, (mp_obj_t)&mp_type_bool },
     { MP_QSTR_bytes, (mp_obj_t)&bytes_type },
 #if MICROPY_ENABLE_FLOAT
     { MP_QSTR_complex, (mp_obj_t)&mp_type_complex },
@@ -43,13 +43,16 @@ STATIC const mp_builtin_elem_t builtin_object_table[] = {
     { MP_QSTR_set, (mp_obj_t)&set_type },
     { MP_QSTR_str, (mp_obj_t)&str_type },
     { MP_QSTR_super, (mp_obj_t)&super_type },
-    { MP_QSTR_tuple, (mp_obj_t)&tuple_type },
+    { MP_QSTR_tuple, (mp_obj_t)&mp_type_tuple },
     { MP_QSTR_type, (mp_obj_t)&mp_type_type },
     { MP_QSTR_zip, (mp_obj_t)&zip_type },
 
     { MP_QSTR_classmethod, (mp_obj_t)&mp_type_classmethod },
     { MP_QSTR_staticmethod, (mp_obj_t)&mp_type_staticmethod },
 
+    // built-in objects
+    { MP_QSTR_Ellipsis, (mp_obj_t)&mp_const_ellipsis_obj },
+
     // built-in user functions
     { MP_QSTR_abs, (mp_obj_t)&mp_builtin_abs_obj },
     { MP_QSTR_all, (mp_obj_t)&mp_builtin_all_obj },
diff --git a/py/obj.c b/py/obj.c
index 18f66a2b4..c2cdcdc7e 100644
--- a/py/obj.c
+++ b/py/obj.c
@@ -79,11 +79,11 @@ machine_int_t mp_obj_hash(mp_obj_t o_in) {
         return MP_OBJ_SMALL_INT_VALUE(o_in);
     } else if (MP_OBJ_IS_STR(o_in)) {
         return mp_obj_str_get_hash(o_in);
-    } else if (MP_OBJ_IS_TYPE(o_in, &none_type)) {
+    } else if (MP_OBJ_IS_TYPE(o_in, &mp_type_NoneType)) {
         return (machine_int_t)o_in;
     } else if (MP_OBJ_IS_TYPE(o_in, &fun_native_type) || MP_OBJ_IS_TYPE(o_in, &fun_bc_type)) {
         return (machine_int_t)o_in;
-    } else if (MP_OBJ_IS_TYPE(o_in, &tuple_type)) {
+    } else if (MP_OBJ_IS_TYPE(o_in, &mp_type_tuple)) {
         return mp_obj_tuple_hash(o_in);
 
     // TODO hash class and instances
@@ -207,7 +207,7 @@ void mp_obj_get_complex(mp_obj_t arg, mp_float_t *real, mp_float_t *imag) {
 #endif
 
 void mp_obj_get_array(mp_obj_t o, uint *len, mp_obj_t **items) {
-    if (MP_OBJ_IS_TYPE(o, &tuple_type)) {
+    if (MP_OBJ_IS_TYPE(o, &mp_type_tuple)) {
         mp_obj_tuple_get(o, len, items);
     } else if (MP_OBJ_IS_TYPE(o, &list_type)) {
         mp_obj_list_get(o, len, items);
@@ -217,9 +217,9 @@ void mp_obj_get_array(mp_obj_t o, uint *len, mp_obj_t **items) {
 }
 
 void mp_obj_get_array_fixed_n(mp_obj_t o, uint len, mp_obj_t **items) {
-    if (MP_OBJ_IS_TYPE(o, &tuple_type) || MP_OBJ_IS_TYPE(o, &list_type)) {
+    if (MP_OBJ_IS_TYPE(o, &mp_type_tuple) || MP_OBJ_IS_TYPE(o, &list_type)) {
         uint seq_len;
-        if (MP_OBJ_IS_TYPE(o, &tuple_type)) {
+        if (MP_OBJ_IS_TYPE(o, &mp_type_tuple)) {
             mp_obj_tuple_get(o, &seq_len, items);
         } else {
             mp_obj_list_get(o, &seq_len, items);
@@ -237,7 +237,7 @@ uint mp_get_index(const mp_obj_type_t *type, machine_uint_t len, mp_obj_t index,
     int i;
     if (MP_OBJ_IS_SMALL_INT(index)) {
         i = MP_OBJ_SMALL_INT_VALUE(index);
-    } else if (MP_OBJ_IS_TYPE(index, &bool_type)) {
+    } else if (MP_OBJ_IS_TYPE(index, &mp_type_bool)) {
         i = (index == mp_const_true ? 1 : 0);
     } else {
         nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "%s indices must be integers, not %s", qstr_str(type->name), mp_obj_get_type_str(index)));
diff --git a/py/obj.h b/py/obj.h
index 500ffbdc0..97d45a796 100644
--- a/py/obj.h
+++ b/py/obj.h
@@ -226,12 +226,17 @@ extern const mp_obj_type_t mp_type_ValueError;
 extern const mp_obj_type_t mp_type_ZeroDivisionError;
 
 // Constant objects, globally accessible
-extern const mp_obj_t mp_const_none;
-extern const mp_obj_t mp_const_false;
-extern const mp_obj_t mp_const_true;
-extern const mp_obj_t mp_const_empty_tuple;
-extern const mp_obj_t mp_const_ellipsis;
-extern const mp_obj_t mp_const_GeneratorExit;
+// The macros are for convenience only
+#define mp_const_none ((mp_obj_t)&mp_const_none_obj)
+#define mp_const_false ((mp_obj_t)&mp_const_false_obj)
+#define mp_const_true ((mp_obj_t)&mp_const_true_obj)
+#define mp_const_empty_tuple ((mp_obj_t)&mp_const_empty_tuple_obj)
+extern const struct _mp_obj_none_t mp_const_none_obj;
+extern const struct _mp_obj_bool_t mp_const_false_obj;
+extern const struct _mp_obj_bool_t mp_const_true_obj;
+extern const struct _mp_obj_tuple_t mp_const_empty_tuple_obj;
+extern const struct _mp_obj_ellipsis_t mp_const_ellipsis_obj;
+extern const struct _mp_obj_exception_t mp_const_GeneratorExit_obj;
 
 // General API for objects
 
@@ -298,10 +303,10 @@ mp_obj_t mp_obj_len_maybe(mp_obj_t o_in); /* may return NULL */
 extern const mp_obj_type_t mp_type_object;
 
 // none
-extern const mp_obj_type_t none_type;
+extern const mp_obj_type_t mp_type_NoneType;
 
 // bool
-extern const mp_obj_type_t bool_type;
+extern const mp_obj_type_t mp_type_bool;
 #define MP_BOOL(x) (x ? mp_const_true : mp_const_false)
 
 // cell
@@ -359,7 +364,7 @@ mp_obj_t mp_obj_complex_binary_op(int op, mp_float_t lhs_real, mp_float_t lhs_im
 #endif
 
 // tuple
-extern const mp_obj_type_t tuple_type;
+extern const mp_obj_type_t mp_type_tuple;
 void mp_obj_tuple_get(mp_obj_t self_in, uint *len, mp_obj_t **items);
 void mp_obj_tuple_del(mp_obj_t self_in);
 machine_int_t mp_obj_tuple_hash(mp_obj_t self_in);
diff --git a/py/objbool.c b/py/objbool.c
index 9b4af2a31..5f17fd613 100644
--- a/py/objbool.c
+++ b/py/objbool.c
@@ -43,7 +43,7 @@ STATIC mp_obj_t bool_unary_op(int op, mp_obj_t o_in) {
     }
 }
 
-const mp_obj_type_t bool_type = {
+const mp_obj_type_t mp_type_bool = {
     { &mp_type_type },
     .name = MP_QSTR_bool,
     .print = bool_print,
@@ -51,8 +51,5 @@ const mp_obj_type_t bool_type = {
     .unary_op = bool_unary_op,
 };
 
-STATIC const mp_obj_bool_t false_obj = {{&bool_type}, false};
-STATIC const mp_obj_bool_t true_obj = {{&bool_type}, true};
-
-const mp_obj_t mp_const_false = (mp_obj_t)&false_obj;
-const mp_obj_t mp_const_true = (mp_obj_t)&true_obj;
+const mp_obj_bool_t mp_const_false_obj = {{&mp_type_bool}, false};
+const mp_obj_bool_t mp_const_true_obj = {{&mp_type_bool}, true};
diff --git a/py/objexcept.c b/py/objexcept.c
index d4c4b1249..6f2a3f096 100644
--- a/py/objexcept.c
+++ b/py/objexcept.c
@@ -14,7 +14,7 @@
 // This is unified class for C-level and Python-level exceptions
 // Python-level exceptions have empty ->msg and all arguments are in
 // args tuple. C-level exceptions likely have ->msg set, and args is empty.
-typedef struct mp_obj_exception_t {
+typedef struct _mp_obj_exception_t {
     mp_obj_base_t base;
     mp_obj_t traceback; // a list object, holding (file,line,block) as numbers (not Python objects); a hack for now
     vstr_t *msg;
@@ -24,8 +24,7 @@ typedef struct mp_obj_exception_t {
 // Instance of GeneratorExit exception - needed by generator.close()
 // This would belong to objgenerator.c, but to keep mp_obj_exception_t
 // definition module-private so far, have it here.
-STATIC mp_obj_exception_t GeneratorExit_obj = {{&mp_type_GeneratorExit}, MP_OBJ_NULL, NULL, {{&tuple_type}, 0}};
-const mp_obj_t mp_const_GeneratorExit = (mp_obj_t)&GeneratorExit_obj;
+const mp_obj_exception_t mp_const_GeneratorExit_obj = {{&mp_type_GeneratorExit}, MP_OBJ_NULL, NULL, {{&mp_type_tuple}, 0}};
 
 STATIC void mp_obj_exception_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in, mp_print_kind_t kind) {
     mp_obj_exception_t *o = o_in;
@@ -61,7 +60,7 @@ STATIC mp_obj_t mp_obj_exception_make_new(mp_obj_t type_in, uint n_args, uint n_
     o->base.type = type;
     o->traceback = MP_OBJ_NULL;
     o->msg = NULL;
-    o->args.base.type = &tuple_type;
+    o->args.base.type = &mp_type_tuple;
     o->args.len = n_args;
     memcpy(o->args.items, args, n_args * sizeof(mp_obj_t));
     return o;
@@ -95,7 +94,7 @@ const mp_obj_type_t mp_type_BaseException = {
 };
 
 #define MP_DEFINE_EXCEPTION_BASE(base_name) \
-STATIC const mp_obj_tuple_t mp_type_ ## base_name ## _base_tuple = {{&tuple_type}, 1, {(mp_obj_t)&mp_type_ ## base_name}};\
+STATIC const mp_obj_tuple_t mp_type_ ## base_name ## _base_tuple = {{&mp_type_tuple}, 1, {(mp_obj_t)&mp_type_ ## base_name}};\
 
 #define MP_DEFINE_EXCEPTION(exc_name, base_name) \
 const mp_obj_type_t mp_type_ ## exc_name = { \
diff --git a/py/objfun.c b/py/objfun.c
index e626c152a..937071660 100644
--- a/py/objfun.c
+++ b/py/objfun.c
@@ -373,7 +373,7 @@ STATIC machine_uint_t convert_obj_for_inline_asm(mp_obj_t obj) {
         // convert float to int (could also pass in float registers)
         return (machine_int_t)mp_obj_float_get(obj);
 #endif
-    } else if (MP_OBJ_IS_TYPE(obj, &tuple_type)) {
+    } else if (MP_OBJ_IS_TYPE(obj, &mp_type_tuple)) {
         // pointer to start of tuple (could pass length, but then could use len(x) for that)
         uint len;
         mp_obj_t *items;
diff --git a/py/objgenerator.c b/py/objgenerator.c
index f6c7007a0..a5e2b1a85 100644
--- a/py/objgenerator.c
+++ b/py/objgenerator.c
@@ -171,7 +171,7 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(gen_instance_throw_obj, 2, 4, gen_ins
 
 STATIC mp_obj_t gen_instance_close(mp_obj_t self_in) {
     mp_obj_t ret;
-    switch (mp_obj_gen_resume(self_in, mp_const_none, mp_const_GeneratorExit, &ret)) {
+    switch (mp_obj_gen_resume(self_in, mp_const_none, (mp_obj_t)&mp_const_GeneratorExit_obj, &ret)) {
         case MP_VM_RETURN_YIELD:
             nlr_jump(mp_obj_new_exception_msg(&mp_type_RuntimeError, "generator ignored GeneratorExit"));
 
diff --git a/py/objnamedtuple.c b/py/objnamedtuple.c
index 348530111..a9e6e7d8a 100644
--- a/py/objnamedtuple.c
+++ b/py/objnamedtuple.c
@@ -119,7 +119,7 @@ STATIC mp_obj_t namedtuple_make_new(mp_obj_t type_in, uint n_args, uint n_kw, co
     return tuple;
 }
 
-STATIC const mp_obj_tuple_t namedtuple_base_tuple = {{&tuple_type}, 1, {(mp_obj_t)&tuple_type}};
+STATIC const mp_obj_tuple_t namedtuple_base_tuple = {{&mp_type_tuple}, 1, {(mp_obj_t)&mp_type_tuple}};
 
 mp_obj_t mp_obj_new_namedtuple_type(qstr name, const char *fields) {
     mp_obj_namedtuple_type_t *o = m_new0(mp_obj_namedtuple_type_t, 1);
diff --git a/py/objnone.c b/py/objnone.c
index 1ec3d46fd..3fccd8847 100644
--- a/py/objnone.c
+++ b/py/objnone.c
@@ -22,12 +22,11 @@ STATIC mp_obj_t none_unary_op(int op, mp_obj_t o_in) {
     }
 }
 
-const mp_obj_type_t none_type = {
+const mp_obj_type_t mp_type_NoneType = {
     { &mp_type_type },
     .name = MP_QSTR_NoneType,
     .print = none_print,
     .unary_op = none_unary_op,
 };
 
-STATIC const mp_obj_none_t none_obj = {{&none_type}};
-const mp_obj_t mp_const_none = (mp_obj_t)&none_obj;
+const mp_obj_none_t mp_const_none_obj = {{&mp_type_NoneType}};
diff --git a/py/objslice.c b/py/objslice.c
index 46cce264a..0c28d07ed 100644
--- a/py/objslice.c
+++ b/py/objslice.c
@@ -19,14 +19,13 @@ void ellipsis_print(void (*print)(void *env, const char *fmt, ...), void *env, m
     print(env, "Ellipsis");
 }
 
-const mp_obj_type_t ellipsis_type = {
+const mp_obj_type_t mp_type_ellipsis = {
     { &mp_type_type },
     .name = MP_QSTR_Ellipsis,
     .print = ellipsis_print,
 };
 
-STATIC const mp_obj_ellipsis_t ellipsis_obj = {{&ellipsis_type}};
-const mp_obj_t mp_const_ellipsis = (mp_obj_t)&ellipsis_obj;
+const mp_obj_ellipsis_t mp_const_ellipsis_obj = {{&mp_type_ellipsis}};
 
 /******************************************************************************/
 /* slice object                                                               */
diff --git a/py/objstr.c b/py/objstr.c
index 6812516b4..cf68e95fe 100644
--- a/py/objstr.c
+++ b/py/objstr.c
@@ -309,7 +309,7 @@ STATIC mp_obj_t str_join(mp_obj_t self_in, mp_obj_t arg) {
     // process args
     uint seq_len;
     mp_obj_t *seq_items;
-    if (MP_OBJ_IS_TYPE(arg, &tuple_type)) {
+    if (MP_OBJ_IS_TYPE(arg, &mp_type_tuple)) {
         mp_obj_tuple_get(arg, &seq_len, &seq_items);
     } else if (MP_OBJ_IS_TYPE(arg, &list_type)) {
         mp_obj_list_get(arg, &seq_len, &seq_items);
diff --git a/py/objtuple.c b/py/objtuple.c
index eb3d8259a..6f4753afa 100644
--- a/py/objtuple.c
+++ b/py/objtuple.c
@@ -42,7 +42,7 @@ STATIC mp_obj_t tuple_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const m
         case 1:
         {
             // 1 argument, an iterable from which we make a new tuple
-            if (MP_OBJ_IS_TYPE(args[0], &tuple_type)) {
+            if (MP_OBJ_IS_TYPE(args[0], &mp_type_tuple)) {
                 return args[0];
             }
 
@@ -75,8 +75,8 @@ STATIC mp_obj_t tuple_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const m
 
 // Don't pass RT_BINARY_OP_NOT_EQUAL here
 STATIC bool tuple_cmp_helper(int op, mp_obj_t self_in, mp_obj_t another_in) {
-    assert(MP_OBJ_IS_TYPE(self_in, &tuple_type));
-    if (!MP_OBJ_IS_TYPE(another_in, &tuple_type)) {
+    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_tuple));
+    if (!MP_OBJ_IS_TYPE(another_in, &mp_type_tuple)) {
         return false;
     }
     mp_obj_tuple_t *self = self_in;
@@ -115,7 +115,7 @@ mp_obj_t tuple_binary_op(int op, mp_obj_t lhs, mp_obj_t rhs) {
         }
         case RT_BINARY_OP_ADD:
         {
-            if (!mp_obj_is_subclass_fast(mp_obj_get_type(rhs), (mp_obj_t)&tuple_type)) {
+            if (!mp_obj_is_subclass_fast(mp_obj_get_type(rhs), (mp_obj_t)&mp_type_tuple)) {
                 return NULL;
             }
             mp_obj_tuple_t *p = rhs;
@@ -153,14 +153,14 @@ STATIC mp_obj_t tuple_getiter(mp_obj_t o_in) {
 }
 
 STATIC mp_obj_t tuple_count(mp_obj_t self_in, mp_obj_t value) {
-    assert(MP_OBJ_IS_TYPE(self_in, &tuple_type));
+    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_tuple));
     mp_obj_tuple_t *self = self_in;
     return mp_seq_count_obj(self->items, self->len, value);
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_2(tuple_count_obj, tuple_count);
 
 STATIC mp_obj_t tuple_index(uint n_args, const mp_obj_t *args) {
-    assert(MP_OBJ_IS_TYPE(args[0], &tuple_type));
+    assert(MP_OBJ_IS_TYPE(args[0], &mp_type_tuple));
     mp_obj_tuple_t *self = args[0];
     return mp_seq_index_obj(self->items, self->len, n_args, args);
 }
@@ -173,7 +173,7 @@ STATIC const mp_map_elem_t tuple_locals_dict_table[] = {
 
 STATIC MP_DEFINE_CONST_DICT(tuple_locals_dict, tuple_locals_dict_table);
 
-const mp_obj_type_t tuple_type = {
+const mp_obj_type_t mp_type_tuple = {
     { &mp_type_type },
     .name = MP_QSTR_tuple,
     .print = tuple_print,
@@ -185,15 +185,14 @@ const mp_obj_type_t tuple_type = {
 };
 
 // the zero-length tuple
-STATIC const mp_obj_tuple_t empty_tuple_obj = {{&tuple_type}, 0};
-const mp_obj_t mp_const_empty_tuple = (mp_obj_t)&empty_tuple_obj;
+const mp_obj_tuple_t mp_const_empty_tuple_obj = {{&mp_type_tuple}, 0};
 
 mp_obj_t mp_obj_new_tuple(uint n, const mp_obj_t *items) {
     if (n == 0) {
         return mp_const_empty_tuple;
     }
     mp_obj_tuple_t *o = m_new_obj_var(mp_obj_tuple_t, mp_obj_t, n);
-    o->base.type = &tuple_type;
+    o->base.type = &mp_type_tuple;
     o->len = n;
     if (items) {
         for (int i = 0; i < n; i++) {
@@ -204,7 +203,7 @@ mp_obj_t mp_obj_new_tuple(uint n, const mp_obj_t *items) {
 }
 
 void mp_obj_tuple_get(mp_obj_t self_in, uint *len, mp_obj_t **items) {
-    assert(MP_OBJ_IS_TYPE(self_in, &tuple_type));
+    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_tuple));
     mp_obj_tuple_t *self = self_in;
     if (len) {
         *len = self->len;
@@ -215,13 +214,13 @@ void mp_obj_tuple_get(mp_obj_t self_in, uint *len, mp_obj_t **items) {
 }
 
 void mp_obj_tuple_del(mp_obj_t self_in) {
-    assert(MP_OBJ_IS_TYPE(self_in, &tuple_type));
+    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_tuple));
     mp_obj_tuple_t *self = self_in;
     m_del_var(mp_obj_tuple_t, mp_obj_t, self->len, self);
 }
 
 machine_int_t mp_obj_tuple_hash(mp_obj_t self_in) {
-    assert(MP_OBJ_IS_TYPE(self_in, &tuple_type));
+    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_tuple));
     mp_obj_tuple_t *self = self_in;
     // start hash with pointer to empty tuple, to make it fairly unique
     machine_int_t hash = (machine_int_t)mp_const_empty_tuple;
diff --git a/py/objtype.c b/py/objtype.c
index 51bc9ca3d..e553d8cf7 100644
--- a/py/objtype.c
+++ b/py/objtype.c
@@ -348,7 +348,7 @@ const mp_obj_type_t mp_type_type = {
 };
 
 mp_obj_t mp_obj_new_type(qstr name, mp_obj_t bases_tuple, mp_obj_t locals_dict) {
-    assert(MP_OBJ_IS_TYPE(bases_tuple, &tuple_type)); // Micro Python restriction, for now
+    assert(MP_OBJ_IS_TYPE(bases_tuple, &mp_type_tuple)); // Micro Python restriction, for now
     assert(MP_OBJ_IS_TYPE(locals_dict, &dict_type)); // Micro Python restriction, for now
     mp_obj_type_t *o = m_new0(mp_obj_type_t, 1);
     o->base.type = &mp_type_type;
@@ -502,7 +502,7 @@ STATIC mp_obj_t mp_obj_is_subclass(mp_obj_t object, mp_obj_t classinfo) {
     if (MP_OBJ_IS_TYPE(classinfo, &mp_type_type)) {
         len = 1;
         items = &classinfo;
-    } else if (MP_OBJ_IS_TYPE(classinfo, &tuple_type)) {
+    } else if (MP_OBJ_IS_TYPE(classinfo, &mp_type_tuple)) {
         mp_obj_tuple_get(classinfo, &len, &items);
     } else {
         nlr_jump(mp_obj_new_exception_msg(&mp_type_TypeError, "issubclass() arg 2 must be a class or a tuple of classes"));
diff --git a/py/runtime.c b/py/runtime.c
index 3f637a16f..4dc1c2ef5 100644
--- a/py/runtime.c
+++ b/py/runtime.c
@@ -51,7 +51,6 @@ void rt_init(void) {
 
     // add some builtins that can't be done in ROM
     mp_map_add_qstr(map_globals, MP_QSTR___name__, MP_OBJ_NEW_QSTR(MP_QSTR___main__));
-    mp_map_add_qstr(&map_builtins, MP_QSTR_Ellipsis, mp_const_ellipsis);
 
 #if MICROPY_CPYTHON_COMPAT
     // Precreate sys module, so "import sys" didn't throw exceptions.
@@ -559,9 +558,9 @@ mp_obj_t rt_store_set(mp_obj_t set, mp_obj_t item) {
 // unpacked items are stored in reverse order into the array pointed to by items
 void rt_unpack_sequence(mp_obj_t seq_in, uint num, mp_obj_t *items) {
     uint seq_len;
-    if (MP_OBJ_IS_TYPE(seq_in, &tuple_type) || MP_OBJ_IS_TYPE(seq_in, &list_type)) {
+    if (MP_OBJ_IS_TYPE(seq_in, &mp_type_tuple) || MP_OBJ_IS_TYPE(seq_in, &list_type)) {
         mp_obj_t *seq_items;
-        if (MP_OBJ_IS_TYPE(seq_in, &tuple_type)) {
+        if (MP_OBJ_IS_TYPE(seq_in, &mp_type_tuple)) {
             mp_obj_tuple_get(seq_in, &seq_len, &seq_items);
         } else {
             mp_obj_list_get(seq_in, &seq_len, &seq_items);
diff --git a/py/vm.c b/py/vm.c
index 1a1d345b2..1f349dea6 100644
--- a/py/vm.c
+++ b/py/vm.c
@@ -173,7 +173,7 @@ dispatch_loop:
                         break;
 
                     case MP_BC_LOAD_CONST_ELLIPSIS:
-                        PUSH(mp_const_ellipsis);
+                        PUSH((mp_obj_t)&mp_const_ellipsis_obj);
                         break;
 
                     case MP_BC_LOAD_CONST_SMALL_INT: {