1 files changed, 6 insertions, 0 deletions
diff --git a/py/objlist.c b/py/objlist.c
index ba1c506771..5957c9d4ad 100644
--- a/py/objlist.c
+++ b/py/objlist.c
@@ -104,6 +104,12 @@ STATIC mp_obj_t list_unary_op(mp_uint_t op, mp_obj_t self_in) {
     switch (op) {
         case MP_UNARY_OP_BOOL: return mp_obj_new_bool(self->len != 0);
         case MP_UNARY_OP_LEN: return MP_OBJ_NEW_SMALL_INT(self->len);
+        #if MICROPY_PY_SYS_GETSIZEOF
+        case MP_UNARY_OP_SIZEOF: {
+            size_t sz = sizeof(*self) + sizeof(mp_obj_t) * self->alloc;
+            return MP_OBJ_NEW_SMALL_INT(sz);
+        }
+        #endif
         default: return MP_OBJ_NULL; // op not supported
     }
 }