diff --git a/include/rtthread.h b/include/rtthread.h
index ef01c3e396..1e4b4c5b8d 100644
--- a/include/rtthread.h
+++ b/include/rtthread.h
@@ -151,7 +151,6 @@ rt_err_t rt_thread_mdelay(rt_int32_t ms);
 rt_err_t rt_thread_control(rt_thread_t thread, int cmd, void *arg);
 rt_err_t rt_thread_suspend(rt_thread_t thread);
 rt_err_t rt_thread_resume(rt_thread_t thread);
-void rt_thread_exit(void);
 void rt_thread_timeout(void *parameter);
 
 #ifdef RT_USING_SIGNALS