diff --git a/thead/src/thread.c b/thead/src/thread.c
index c72d018..620def3 100644
--- a/thead/src/thread.c
+++ b/thead/src/thread.c
@@ -3,6 +3,7 @@
 #include "main.h"
 #include "usart.h"
 #include "thread.h"
+#include "core_cm3.h"
 
 /***
 	上下文切换的指针，如果触发了上下文切换，则next_task为下一个执行目标。