diff --git a/components/libc/compilers/dlib/syscalls.c b/components/libc/compilers/dlib/syscalls.c
index c065b44ea4..0d5f02f952 100644
--- a/components/libc/compilers/dlib/syscalls.c
+++ b/components/libc/compilers/dlib/syscalls.c
@@ -7,6 +7,7 @@
  * Date           Author       Notes
  * 2021-02-13     Meco Man     implement exit() and abort()
  */
+#include <rtthread.h>
 
 void exit (int status)
 {