diff --git a/src/thread.c b/src/thread.c
index 2b2fb1922ce9d4314c750bb73eb0803c92f047c3..715596b132ca8aebd6ba2651cdf946a6f7583bea 100644
--- a/src/thread.c
+++ b/src/thread.c
@@ -338,7 +338,7 @@ rt_err_t rt_thread_detach(rt_thread_t thread)
     RT_ASSERT(rt_object_get_type((rt_object_t)thread) == RT_Object_Class_Thread);
     RT_ASSERT(rt_object_is_systemobject((rt_object_t)thread));
 
-    if (thread->stat == RT_THREAD_CLOSE)
+    if ((thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_CLOSE)
         return RT_EOK;
 
     if ((thread->stat & RT_THREAD_STAT_MASK) != RT_THREAD_INIT)
@@ -440,7 +440,7 @@ rt_err_t rt_thread_delete(rt_thread_t thread)
     RT_ASSERT(rt_object_get_type((rt_object_t)thread) == RT_Object_Class_Thread);
     RT_ASSERT(rt_object_is_systemobject((rt_object_t)thread) == RT_FALSE);
 
-    if (thread->stat == RT_THREAD_CLOSE)
+    if ((thread->stat & RT_THREAD_STAT_MASK) == RT_THREAD_CLOSE)
         return RT_EOK;
 
     if ((thread->stat & RT_THREAD_STAT_MASK) != RT_THREAD_INIT)