namedtuple: Inherit unary/binary ops from tuple base class.
diff --git a/py/objtuple.h b/py/objtuple.h
index 6ff38c1..c310bfb 100644
--- a/py/objtuple.h
+++ b/py/objtuple.h
@@ -5,3 +5,5 @@
 } mp_obj_tuple_t;
 
 void tuple_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in, mp_print_kind_t kind);
+mp_obj_t tuple_unary_op(int op, mp_obj_t self_in);
+mp_obj_t tuple_binary_op(int op, mp_obj_t lhs, mp_obj_t rhs);