diff --git a/src/object.c b/src/object.c
index ba8a35a60b..63b308803a 100644
--- a/src/object.c
+++ b/src/object.c
@@ -134,7 +134,7 @@ true_xor(mrb_state *mrb, mrb_value obj)
   int obj2;
 
   mrb_get_args(mrb, "b", &obj2);
-  return obj2 ? mrb_false_value() : mrb_true_value();
+  return mrb_true_or_false_value(!obj2);
 }
 
 /* 15.2.5.3.3  */