diff --git a/include/rtdef.h b/include/rtdef.h
index 49551de9ee5085e1c60c6212c4dd9e36ff7a7d26..f4949c2dff69bd60a1464f8bb79c4ef933c008d7 100644
--- a/include/rtdef.h
+++ b/include/rtdef.h
@@ -45,7 +45,7 @@ extern "C" {
  * @addtogroup BasicDef
  */
 
-/*@{*/
+/**@{*/
 
 /* RT-Thread version information */
 #define RT_VERSION                      4L              /**< major version number */
@@ -88,7 +88,7 @@ typedef rt_base_t                       rt_off_t;       /**< Type for offset */
 #define RT_TRUE                         1               /**< boolean true  */
 #define RT_FALSE                        0               /**< boolean fails */
 
-/*@}*/
+/**@}*/
 
 /* maximum value of base type */
 #define RT_UINT8_MAX                    0xff            /**< Maxium number of UINT8 */
@@ -259,7 +259,7 @@ typedef int (*init_fn_t)(void);
  * @addtogroup Error
  */
 
-/*@{*/
+/**@{*/
 
 /* RT-Thread error code definitions */
 #define RT_EOK                          0               /**< There is no error */
@@ -274,7 +274,7 @@ typedef int (*init_fn_t)(void);
 #define RT_EINTR                        9               /**< Interrupted system call */
 #define RT_EINVAL                       10              /**< Invalid argument */
 
-/*@}*/
+/**@}*/
 
 /**
  * @ingroup BasicDef
@@ -325,7 +325,7 @@ typedef struct rt_slist_node rt_slist_t;                /**< Type for single lis
  * @addtogroup KernelObject
  */
 
-/*@{*/
+/**@{*/
 
 /*
  * kernel object macros
@@ -402,13 +402,13 @@ struct rt_object_information
 #define RT_OBJECT_HOOK_CALL(func, argv)
 #endif
 
-/*@}*/
+/**@}*/
 
 /**
  * @addtogroup Clock
  */
 
-/*@{*/
+/**@{*/
 
 /**
  * clock & timer macros
@@ -452,7 +452,7 @@ struct rt_timer
 };
 typedef struct rt_timer *rt_timer_t;
 
-/*@}*/
+/**@}*/
 
 /**
  * @addtogroup Signal
@@ -465,13 +465,13 @@ typedef siginfo_t rt_siginfo_t;
 
 #define RT_SIG_MAX          32
 #endif
-/*@}*/
+/**@}*/
 
 /**
  * @addtogroup Thread
  */
 
-/*@{*/
+/**@{*/
 
 /*
  * Thread
@@ -613,13 +613,13 @@ struct rt_thread
 };
 typedef struct rt_thread *rt_thread_t;
 
-/*@}*/
+/**@}*/
 
 /**
  * @addtogroup IPC
  */
 
-/*@{*/
+/**@{*/
 
 /**
  * IPC flags and control command definitions
@@ -737,13 +737,13 @@ struct rt_messagequeue
 typedef struct rt_messagequeue *rt_mq_t;
 #endif
 
-/*@}*/
+/**@}*/
 
 /**
  * @addtogroup MM
  */
 
-/*@{*/
+/**@{*/
 
 /*
  * memory management
@@ -811,14 +811,14 @@ struct rt_mempool
 typedef struct rt_mempool *rt_mp_t;
 #endif
 
-/*@}*/
+/**@}*/
 
 #ifdef RT_USING_DEVICE
 /**
  * @addtogroup Device
  */
 
-/*@{*/
+/**@{*/
 
 /**
  * device (I/O) class type
@@ -1063,7 +1063,7 @@ struct rt_device_graphic_ops
 };
 #define rt_graphix_ops(device)          ((struct rt_device_graphic_ops *)(device->user_data))
 
-/*@}*/
+/**@}*/
 #endif
 
 /* definitions for libc */