diff --git a/components/pthreads/mqueue.c b/components/pthreads/mqueue.c
index f4869a047..8f084741d 100644
--- a/components/pthreads/mqueue.c
+++ b/components/pthreads/mqueue.c
@@ -3,24 +3,26 @@
 
 #include <stdarg.h>
 #include <errno.h>
+#ifdef __GNUC__
 #include <sys/fcntl.h>
+#endif
 
-static posix_mq_t* posix_mq_list = RT_NULL;
+static mqd_t posix_mq_list = RT_NULL;
 static struct rt_semaphore posix_mq_lock;
 void posix_mq_system_init()
 {
 	rt_sem_init(&posix_mq_lock, "pmq", 1, RT_IPC_FLAG_FIFO);
 }
 
-rt_inline void posix_mq_insert(posix_mq_t *pmq)
+rt_inline void posix_mq_insert(mqd_t pmq)
 {
 	pmq->next = posix_mq_list;
 	posix_mq_list = pmq;
 }
 
-static void posix_mq_delete(posix_mq_t *pmq)
+static void posix_mq_delete(mqd_t pmq)
 {
-	posix_mq_t *iter;
+	mqd_t iter;
 	if (posix_mq_list == pmq)
 	{
 		posix_mq_list = pmq->next;
@@ -48,9 +50,9 @@ static void posix_mq_delete(posix_mq_t *pmq)
 	}
 }
 
-static posix_mq_t *posix_mq_find(const char* name)
+static mqd_t posix_mq_find(const char* name)
 {
-	posix_mq_t *iter;
+	mqd_t iter;
 	rt_object_t object;
 
 	for (iter = posix_mq_list; iter != RT_NULL; iter = iter->next)
@@ -81,8 +83,8 @@ int mq_getattr(mqd_t mqdes, struct mq_attr *mqstat)
 		return -1;
 	}
 
-	mqstat->mq_maxmsg = mqdes->mq->mq->max_msgs;
-	mqstat->mq_msgsize = mqdes->mq->mq->msg_size;
+	mqstat->mq_maxmsg = mqdes->mq->max_msgs;
+	mqstat->mq_msgsize = mqdes->mq->msg_size;
 	mqstat->mq_curmsgs = 0;
 	mqstat->mq_flags = 0;
 
@@ -122,40 +124,27 @@ mqd_t mq_open(const char *name, int oflag, ...)
 	    	goto __return;
 	    }
 
-	    mqdes->flags = oflag;
-	    mqdes->mq = (posix_mq_t*) rt_malloc (sizeof(posix_mq_t));
-	    if (mqdes->mq == RT_NULL)
-	    {
-	    	rt_set_errno(ENFILE);
-	    	goto __return;
-	    }
-
 	    /* create RT-Thread message queue */
-		mqdes->mq->mq = rt_mq_create(name, attr->mq_msgsize, attr->mq_maxmsg, RT_IPC_FLAG_FIFO);
-		if (mqdes->mq->mq == RT_NULL) /* create failed */
+		mqdes->mq = rt_mq_create(name, attr->mq_msgsize, attr->mq_maxmsg, RT_IPC_FLAG_FIFO);
+		if (mqdes->mq == RT_NULL) /* create failed */
 		{
 			rt_set_errno(ENFILE);
 			goto __return;
 		}
 		/* initialize reference count */
-		mqdes->mq->refcount = 1;
-		mqdes->mq->unlinked = 0;
+		mqdes->refcount = 1;
+		mqdes->unlinked = 0;
 
 		/* insert mq to posix mq list */
-		posix_mq_insert(mqdes->mq);
+		posix_mq_insert(mqdes);
 	}
 	else
 	{
-		posix_mq_t *mq;
-
 		/* find mqueue */
-		mq = posix_mq_find(name);
-		if (mq != RT_NULL)
+		mqdes = posix_mq_find(name);
+		if (mqdes != RT_NULL)
 		{
-			mqdes = (mqd_t) rt_malloc (sizeof(struct mqdes));
-			mqdes->mq = mq;
-			mqdes->flags = oflag;
-			mq->refcount ++; /* increase reference count */
+			mqdes->refcount ++; /* increase reference count */
 		}
 		else
 		{
@@ -176,9 +165,7 @@ __return:
 		if (mqdes->mq != RT_NULL)
 		{
 			/* delete RT-Thread message queue */
-			if (mqdes->mq->mq != RT_NULL)
-				rt_mq_delete(mqdes->mq->mq);
-			rt_free(mqdes->mq);
+			rt_mq_delete(mqdes->mq);
 		}
 		rt_free(mqdes);
 	}
@@ -195,7 +182,7 @@ ssize_t mq_receive(mqd_t mqdes, char *msg_ptr, size_t msg_len, unsigned *msg_pri
 		return -1;
 	}
 
-	result = rt_mq_recv(mqdes->mq->mq, msg_ptr, msg_len, RT_WAITING_FOREVER);
+	result = rt_mq_recv(mqdes->mq, msg_ptr, msg_len, RT_WAITING_FOREVER);
 	if (result == RT_EOK)
 		return msg_len;
 
@@ -213,7 +200,7 @@ int mq_send(mqd_t mqdes, const char *msg_ptr, size_t msg_len, unsigned msg_prio)
 		return -1;
 	}
 
-	result = rt_mq_send(mqdes->mq->mq, (void*)msg_ptr, msg_len);
+	result = rt_mq_send(mqdes->mq, (void*)msg_ptr, msg_len);
 	if (result == RT_EOK)
 		return 0;
 
@@ -236,7 +223,7 @@ ssize_t mq_timedreceive(mqd_t mqdes, char *msg_ptr, size_t msg_len,
 
 	tick = libc_time_to_tick(abs_timeout);
 
-	result = rt_mq_recv(mqdes->mq->mq, msg_ptr, msg_len, tick);
+	result = rt_mq_recv(mqdes->mq, msg_ptr, msg_len, tick);
 	if (result == RT_EOK) return msg_len;
 
 	if (result == -RT_ETIMEOUT)
@@ -270,23 +257,21 @@ int mq_close(mqd_t mqdes)
 
     /* lock posix mqueue list */
     rt_sem_take(&posix_mq_lock, RT_WAITING_FOREVER);
-    mqdes->mq->refcount --;
-    if (mqdes->mq->refcount == 0)
+    mqdes->refcount --;
+    if (mqdes->refcount == 0)
     {
     	/* delete from posix mqueue list */
-    	if (mqdes->mq->unlinked)
-    		posix_mq_delete(mqdes->mq);
-    	mqdes->mq = RT_NULL;
+    	if (mqdes->unlinked)
+    		posix_mq_delete(mqdes);
     }
     rt_sem_release(&posix_mq_lock);
 
-    rt_free(mqdes);
     return 0;
 }
 
 int mq_unlink(const char *name)
 {
-	posix_mq_t *pmq;
+	mqd_t pmq;
 
     /* lock posix mqueue list */
     rt_sem_take(&posix_mq_lock, RT_WAITING_FOREVER);
diff --git a/components/pthreads/mqueue.h b/components/pthreads/mqueue.h
index fb99e5806..c6d17b80f 100644
--- a/components/pthreads/mqueue.h
+++ b/components/pthreads/mqueue.h
@@ -7,7 +7,7 @@
 #include <sys/signal.h>
 #include <pthread.h>
 
-struct posix_mq
+struct mqdes
 {
 	/* reference count and unlinked */
 	rt_uint16_t refcount;
@@ -16,14 +16,7 @@ struct posix_mq
 	/* RT-Thread message queue */
 	rt_mq_t mq;
 	/* next posix mqueue */
-	struct posix_mq* next;
-};
-typedef struct posix_mq posix_mq_t;
-
-struct mqdes
-{
-	rt_uint32_t flags;
-	posix_mq_t* mq;
+	struct mqdes* next;
 };
 typedef struct mqdes* mqd_t;