diff --git a/include/rtdef.h b/include/rtdef.h
index b391ff7685..747643bb82 100644
--- a/include/rtdef.h
+++ b/include/rtdef.h
@@ -372,20 +372,20 @@ typedef struct rt_object *rt_object_t;                  /**< Type for kernel obj
  */
 enum rt_object_class_type
 {
-    RT_Object_Class_Null   = 0,                         /**< The object is not used. */
-    RT_Object_Class_Thread,                             /**< The object is a thread. */
-    RT_Object_Class_Semaphore,                          /**< The object is a semaphore. */
-    RT_Object_Class_Mutex,                              /**< The object is a mutex. */
-    RT_Object_Class_Event,                              /**< The object is a event. */
-    RT_Object_Class_MailBox,                            /**< The object is a mail box. */
-    RT_Object_Class_MessageQueue,                       /**< The object is a message queue. */
-    RT_Object_Class_MemHeap,                            /**< The object is a memory heap */
-    RT_Object_Class_MemPool,                            /**< The object is a memory pool. */
-    RT_Object_Class_Device,                             /**< The object is a device */
-    RT_Object_Class_Timer,                              /**< The object is a timer. */
-    RT_Object_Class_Module,                             /**< The object is a module. */
-    RT_Object_Class_Unknown,                            /**< The object is unknown. */
-    RT_Object_Class_Static = 0x80                       /**< The object is a static object. */
+    RT_Object_Class_Null          = 0x00,      /**< The object is not used. */
+    RT_Object_Class_Thread        = 0x01,      /**< The object is a thread. */
+    RT_Object_Class_Semaphore     = 0x02,      /**< The object is a semaphore. */
+    RT_Object_Class_Mutex         = 0x03,      /**< The object is a mutex. */
+    RT_Object_Class_Event         = 0x04,      /**< The object is a event. */
+    RT_Object_Class_MailBox       = 0x05,      /**< The object is a mail box. */
+    RT_Object_Class_MessageQueue  = 0x06,      /**< The object is a message queue. */
+    RT_Object_Class_MemHeap       = 0x07,      /**< The object is a memory heap. */
+    RT_Object_Class_MemPool       = 0x08,      /**< The object is a memory pool. */
+    RT_Object_Class_Device        = 0x09,      /**< The object is a device. */
+    RT_Object_Class_Timer         = 0x0a,      /**< The object is a timer. */
+    RT_Object_Class_Module        = 0x0b,      /**< The object is a module. */
+    RT_Object_Class_Unknown       = 0x0c,      /**< The object is unknown. */
+    RT_Object_Class_Static        = 0x80       /**< The object is a static object. */
 };
 
 /**