diff --git a/Ubiquitous/XiZi/kernel/thread/mutex.c b/Ubiquitous/XiZi/kernel/thread/mutex.c
index 9428a853d..88c1177a9 100644
--- a/Ubiquitous/XiZi/kernel/thread/mutex.c
+++ b/Ubiquitous/XiZi/kernel/thread/mutex.c
@@ -114,7 +114,7 @@ static int32 _MutexObtain(struct Mutex *mutex, int32 msec)
                     KTaskPrioSet(mutex->holder->id.id, task->task_dync_sched_member.cur_prio);
                 }
 
-                LinklistSuspend(&(mutex->pend_list), task, LINKLIST_FLAG_FIFO);
+                LinklistSuspend(&(mutex->pend_list), task, LINKLIST_FLAG_PRIO);
 
                 if (wait_time > 0) {
                     SYS_KDEBUG_LOG(KDBG_IPC,
diff --git a/Ubiquitous/XiZi/kernel/thread/semaphore.c b/Ubiquitous/XiZi/kernel/thread/semaphore.c
index 4bd745beb..ac6f6eeb3 100644
--- a/Ubiquitous/XiZi/kernel/thread/semaphore.c
+++ b/Ubiquitous/XiZi/kernel/thread/semaphore.c
@@ -120,7 +120,7 @@ static int32 _SemaphoreObtain(struct Semaphore *sem, int32 msec)
     SYS_KDEBUG_LOG(KDBG_IPC, ("obtain semaphore: suspending task %s\n",
             GetKTaskDescriptor()->task_base_info.name));
 
-    LinklistSuspend(&sem->pend_list, task, LINKLIST_FLAG_FIFO);
+    LinklistSuspend(&sem->pend_list, task, LINKLIST_FLAG_PRIO);
 
     if (wait_time > 0) {
          KTaskSetDelay(task, wait_time);