diff --git a/core/include/blue/core/object.h b/core/include/blue/core/object.h
index f4accba..a9b75b9 100644
--- a/core/include/blue/core/object.h
+++ b/core/include/blue/core/object.h
@@ -10,6 +10,8 @@
 #define B_OBJECT(p)    ((b_object *)(p))
 #define B_TYPE_OBJECT  (b_object_get_type())
 
+#define B_RV(p)        (b_object_make_rvalue(p))
+
 struct b_stream;
 
 typedef struct _b_object b_object;
@@ -26,6 +28,7 @@ BLUE_API void *b_object_get_interface(const b_object *object, b_type type);
 
 BLUE_API b_object *b_object_ref(b_object *p);
 BLUE_API void b_object_unref(b_object *p);
+BLUE_API b_object *b_object_make_rvalue(b_object *p);
 
 BLUE_API b_object *b_object_create(b_type type);
 BLUE_API void b_object_to_string(const b_object *p, struct b_stream *out);
diff --git a/core/object.c b/core/object.c
index bc7ded0..8e9cd45 100644
--- a/core/object.c
+++ b/core/object.c
@@ -157,3 +157,9 @@ void b_object_unref(struct _b_object *p)
 
 	free(p);
 }
+
+struct _b_object *b_object_make_rvalue(struct _b_object *p)
+{
+	p->obj_ref = 0;
+	return p;
+}