1 files changed, 1 insertions, 0 deletions
diff --git a/py/obj.h b/py/obj.h
index 26a387a2f9..4f32a808f3 100644
--- a/py/obj.h
+++ b/py/obj.h
@@ -74,6 +74,7 @@ typedef struct _mp_obj_base_t mp_obj_base_t;
 #define MP_OBJ_IS_TYPE(o, t) (MP_OBJ_IS_OBJ(o) && (((mp_obj_base_t*)(o))->type == (t))) // this does not work for checking int, str or fun; use below macros for that
 #define MP_OBJ_IS_INT(o) (MP_OBJ_IS_SMALL_INT(o) || MP_OBJ_IS_TYPE(o, &mp_type_int))
 #define MP_OBJ_IS_STR(o) (MP_OBJ_IS_QSTR(o) || MP_OBJ_IS_TYPE(o, &mp_type_str))
+#define MP_OBJ_IS_STR_OR_BYTES(o) (MP_OBJ_IS_STR(o) || MP_OBJ_IS_TYPE(o, &mp_type_bytes))
 #define MP_OBJ_IS_FUN(o) (MP_OBJ_IS_OBJ(o) && (((mp_obj_base_t*)(o))->type->binary_op == mp_obj_fun_binary_op))
 
 #define MP_OBJ_SMALL_INT_VALUE(o) (((mp_int_t)(o)) >> 1)