diff --git a/components/pthreads/pthread_cond.c b/components/pthreads/pthread_cond.c
index e5342dd775078792e15aadef9919d3ecc9694a5e..25628fc2b3da510dffd2f4b2935691b5f95e286a 100644
--- a/components/pthreads/pthread_cond.c
+++ b/components/pthreads/pthread_cond.c
@@ -98,7 +98,11 @@ int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
 
     rt_snprintf(cond_name, sizeof(cond_name), "cond%02d", cond_num++);
 
-    cond->attr = *attr;
+	if (attr == RT_NULL) /* use default value */
+		cond->attr = PTHREAD_PROCESS_PRIVATE;
+	else 
+	    cond->attr = *attr;
+
     result = rt_sem_init(&cond->sem, cond_name, 0, RT_IPC_FLAG_FIFO);
     if (result != RT_EOK)
         return EINVAL;