diff --git a/components/drivers/core/device.c b/components/drivers/core/device.c
index c99cddf62b..49b428a577 100644
--- a/components/drivers/core/device.c
+++ b/components/drivers/core/device.c
@@ -163,7 +163,7 @@ void rt_device_destroy(rt_device_t dev)
 {
     /* parameter check */
     RT_ASSERT(dev != RT_NULL);
-    RT_ASSERT(rt_object_get_type(&dev->parent) == RT_Object_Class_Device);
+    RT_ASSERT(rt_object_get_type(&dev->parent) == RT_Object_Class_Null);
     RT_ASSERT(rt_object_is_systemobject(&dev->parent) == RT_FALSE);
 
     rt_object_detach(&(dev->parent));
diff --git a/src/object.c b/src/object.c
index 0cb1a188a3..4e28eeb57e 100644
--- a/src/object.c
+++ b/src/object.c
@@ -429,7 +429,7 @@ void rt_object_detach(rt_object_t object)
     rt_list_remove(&(object->list));
     rt_spin_unlock_irqrestore(&(information->spinlock), level);
 
-    object->type = 0;
+    object->type = RT_Object_Class_Null;
 }
 
 #ifdef RT_USING_HEAP